77656365 has 12 divisors (see below), whose sum is σ = 134604444. Its totient is φ = 41416704.

The previous prime is 77656351. The next prime is 77656387. The reversal of 77656365 is 56365677.

77656365 is a `hidden beast` number, since 7 + 7 + 6 + 5 + 636 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 53978409 + 23677956 = 7347^2 + 4866^2 .

It is not a de Polignac number, because 77656365 - 2⁶ = 77656301 is a prime.

It is a super-2 number, since 2×77656365² = 12061022050026450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1725697 = 77656365 / (7 + 7 + 6 + 5 + 6 + 3 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 77656365.

It is a congruent number.

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, 862804 + ... + 862893.

It is an arithmetic number, because the mean of its divisors is an integer number (11217037).

Almost surely, 2^77656365 is an apocalyptic number.

It is an amenable number.

77656365 is a deficient number, since it is larger than the sum of its proper divisors (56948079).

77656365 is a wasteful number, since it uses less digits than its factorization.

77656365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725708 (or 1725705 counting only the distinct ones).

The product of its digits is 793800, while the sum is 45.

The square root of 77656365 is about 8812.2848909917. The cubic root of 77656365 is about 426.6374935973.

The spelling of 77656365 in words is "seventy-seven million, six hundred fifty-six thousand, three hundred sixty-five".