77568665 has 8 divisors (see below), whose sum is σ = 96085248. Its totient is φ = 60053040.

The previous prime is 77568643. The next prime is 77568677. The reversal of 77568665 is 56686577.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77568665 - 2¹⁰ = 77567641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250067 + ... + 250376.

It is an arithmetic number, because the mean of its divisors is an integer number (12010656).

Almost surely, 2^77568665 is an apocalyptic number.

It is an amenable number.

77568665 is a deficient number, since it is larger than the sum of its proper divisors (18516583).

77568665 is a wasteful number, since it uses less digits than its factorization.

77568665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500479.

The product of its digits is 2116800, while the sum is 50.

The square root of 77568665 is about 8807.3074773168. The cubic root of 77568665 is about 426.4768276423.

The spelling of 77568665 in words is "seventy-seven million, five hundred sixty-eight thousand, six hundred sixty-five".