165597930 has 48 divisors (see below), whose sum is σ = 449280000. Its totient is φ = 42238944.

The previous prime is 165597919. The next prime is 165597961. The reversal of 165597930 is 39795561.

165597930 is a `hidden beast` number, since 1 + 6 + 559 + 7 + 93 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 37930 + ... + 42069.

It is an arithmetic number, because the mean of its divisors is an integer number (9360000).

Almost surely, 2^165597930 is an apocalyptic number.

165597930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165597930 is an abundant number, since it is smaller than the sum of its proper divisors (283682070).

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

165597930 is a wasteful number, since it uses less digits than its factorization.

165597930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80035 (or 80032 counting only the distinct ones).

The product of its (nonzero) digits is 255150, while the sum is 45.

The square root of 165597930 is about 12868.4859249253. The cubic root of 165597930 is about 549.1423879431.

The spelling of 165597930 in words is "one hundred sixty-five million, five hundred ninety-seven thousand, nine hundred thirty".