765161660 has 12 divisors (see below), whose sum is σ = 1606839528. Its totient is φ = 306064656.

The previous prime is 765161659. The next prime is 765161669. The reversal of 765161660 is 66161567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765161669) 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 3 ways as a sum of consecutive naturals, for example, 19129022 + ... + 19129061.

It is an arithmetic number, because the mean of its divisors is an integer number (133903294).

Almost surely, 2^765161660 is an apocalyptic number.

It is an amenable number.

765161660 is an abundant number, since it is smaller than the sum of its proper divisors (841677868).

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

765161660 is a wasteful number, since it uses less digits than its factorization.

765161660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38258092 (or 38258090 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 765161660 is about 27661.5556323212. Note that the first 3 decimals coincide. The cubic root of 765161660 is about 914.6418457533.

The spelling of 765161660 in words is "seven hundred sixty-five million, one hundred sixty-one thousand, six hundred sixty".