77956065 has 72 divisors (see below), whose sum is σ = 151045440. Its totient is φ = 37160640.

The previous prime is 77956063. The next prime is 77956097. The reversal of 77956065 is 56065977.

It is a happy number.

It is not a de Polignac number, because 77956065 - 2¹ = 77956063 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 77956065.

It is not an unprimeable number, because it can be changed into a prime (77956063) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 560766 + ... + 560904.

Almost surely, 2^77956065 is an apocalyptic number.

It is an amenable number.

77956065 is a deficient number, since it is larger than the sum of its proper divisors (73089375).

77956065 is a wasteful number, since it uses less digits than its factorization.

77956065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 396900, while the sum is 45.

The square root of 77956065 is about 8829.2731863954. The cubic root of 77956065 is about 427.1856311973.

The spelling of 77956065 in words is "seventy-seven million, nine hundred fifty-six thousand, sixty-five".