165765670 has 32 divisors (see below), whose sum is σ = 346602816. Its totient is φ = 55900800.

The previous prime is 165765643. The next prime is 165765707. The reversal of 165765670 is 76567561.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15141 + ... + 23680.

It is an arithmetic number, because the mean of its divisors is an integer number (10831338).

Almost surely, 2^165765670 is an apocalyptic number.

165765670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165765670 is an abundant number, since it is smaller than the sum of its proper divisors (180837146).

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

165765670 is a wasteful number, since it uses less digits than its factorization.

165765670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38896.

The product of its (nonzero) digits is 264600, while the sum is 43.

The square root of 165765670 is about 12875.0017475727. The cubic root of 165765670 is about 549.3277406225.

The spelling of 165765670 in words is "one hundred sixty-five million, seven hundred sixty-five thousand, six hundred seventy".