77696865 has 12 divisors (see below), whose sum is σ = 134674644. Its totient is φ = 41438304.

The previous prime is 77696863. The next prime is 77696867. The reversal of 77696865 is 56869677.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77696863) and next prime (77696867).

It can be written as a sum of positive squares in 2 ways, for example, as 62110161 + 15586704 = 7881^2 + 3948^2 .

It is not a de Polignac number, because 77696865 - 2¹ = 77696863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77696863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 863254 + ... + 863343.

It is an arithmetic number, because the mean of its divisors is an integer number (11222887).

Almost surely, 2^77696865 is an apocalyptic number.

It is an amenable number.

77696865 is a deficient number, since it is larger than the sum of its proper divisors (56977779).

77696865 is a wasteful number, since it uses less digits than its factorization.

77696865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726608 (or 1726605 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 77696865 is about 8814.5825198928. The cubic root of 77696865 is about 426.7116485643.

The spelling of 77696865 in words is "seventy-seven million, six hundred ninety-six thousand, eight hundred sixty-five".