165507740 has 24 divisors (see below), whose sum is σ = 347922960. Its totient is φ = 66135168.

The previous prime is 165507737. The next prime is 165507757. The reversal of 165507740 is 47705561.

It is a self number, because there is not a number n which added to its sum of digits gives 165507740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18776 + ... + 26144.

It is an arithmetic number, because the mean of its divisors is an integer number (14496790).

Almost surely, 2^165507740 is an apocalyptic number.

165507740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165507740 is an abundant number, since it is smaller than the sum of its proper divisors (182415220).

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

165507740 is a wasteful number, since it uses less digits than its factorization.

165507740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8501 (or 8499 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 165507740 is about 12864.9811503943. The cubic root of 165507740 is about 549.0426762578.

The spelling of 165507740 in words is "one hundred sixty-five million, five hundred seven thousand, seven hundred forty".