165997480 has 48 divisors (see below), whose sum is σ = 410547060. Its totient is φ = 60360960.

The previous prime is 165997477. The next prime is 165997511. The reversal of 165997480 is 84799561.

It can be written as a sum of positive squares in 2 ways, for example, as 158911236 + 7086244 = 12606^2 + 2662^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12309 + ... + 21988.

Almost surely, 2^165997480 is an apocalyptic number.

165997480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165997480 is an abundant number, since it is smaller than the sum of its proper divisors (244549580).

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

165997480 is a wasteful number, since it uses less digits than its factorization.

165997480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34330 (or 34315 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 165997480 is about 12884.0009313877. Note that the first 3 decimals coincide. The cubic root of 165997480 is about 549.5836849555.

The spelling of 165997480 in words is "one hundred sixty-five million, nine hundred ninety-seven thousand, four hundred eighty".