166506040 has 32 divisors (see below), whose sum is σ = 375943680. Its totient is φ = 66370432.

The previous prime is 166506037. The next prime is 166506047. The reversal of 166506040 is 40605661.

It is a super-2 number, since 2×166506040² = 55448522712963200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166506047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4617 + ... + 18823.

It is an arithmetic number, because the mean of its divisors is an integer number (11748240).

Almost surely, 2^166506040 is an apocalyptic number.

166506040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166506040 is an abundant number, since it is smaller than the sum of its proper divisors (209437640).

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

166506040 is a wasteful number, since it uses less digits than its factorization.

166506040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14511 (or 14507 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 166506040 is about 12903.7219436874. The cubic root of 166506040 is about 550.1443588010.

It can be divided in two parts, 16 and 6506040, that added together give a palindrome (6506056).

The spelling of 166506040 in words is "one hundred sixty-six million, five hundred six thousand, forty".