166551000 has 384 divisors, whose sum is σ = 665832960. Its totient is φ = 34272000.

The previous prime is 166550999. The next prime is 166551001. The reversal of 166551000 is 155661.

It is an interprime number because it is at equal distance from previous prime (166550999) and next prime (166551001).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166551001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1616949 + ... + 1617051.

It is an arithmetic number, because the mean of its divisors is an integer number (1733940).

Almost surely, 2^166551000 is an apocalyptic number.

166551000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166551000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332916480).

166551000 is an abundant number, since it is smaller than the sum of its proper divisors (499281960).

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

166551000 is a wasteful number, since it uses less digits than its factorization.

166551000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 166551000 is about 12905.4639591144. The cubic root of 166551000 is about 550.1938710478.

The spelling of 166551000 in words is "one hundred sixty-six million, five hundred fifty-one thousand".