166696530 has 288 divisors, whose sum is σ = 558767808. Its totient is φ = 31449600.

The previous prime is 166696511. The next prime is 166696549. The reversal of 166696530 is 35696661.

166696530 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166696511) and next prime (166696549).

It is a super-2 number, since 2×166696530² = 55575466228081800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2732700 + ... + 2732760.

It is an arithmetic number, because the mean of its divisors is an integer number (1940166).

Almost surely, 2^166696530 is an apocalyptic number.

166696530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166696530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279383904).

166696530 is an abundant number, since it is smaller than the sum of its proper divisors (392071278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166696530 is a wasteful number, since it uses less digits than its factorization.

166696530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 166696530 is about 12911.1010374793. The cubic root of 166696530 is about 550.3540750375.

It can be divided in two parts, 166 and 696530, that added together give a palindrome (696696).

The spelling of 166696530 in words is "one hundred sixty-six million, six hundred ninety-six thousand, five hundred thirty".