76685691 has 16 divisors (see below), whose sum is σ = 113961600. Its totient is φ = 45583488.

The previous prime is 76685689. The next prime is 76685699. The reversal of 76685691 is 19658667.

It is not a de Polignac number, because 76685691 - 2¹ = 76685689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76685691.

It is not an unprimeable number, because it can be changed into a prime (76685699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38601 + ... + 40538.

It is an arithmetic number, because the mean of its divisors is an integer number (7122600).

Almost surely, 2^76685691 is an apocalyptic number.

76685691 is a deficient number, since it is larger than the sum of its proper divisors (37275909).

76685691 is a wasteful number, since it uses less digits than its factorization.

76685691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79178.

The product of its digits is 544320, while the sum is 48.

The square root of 76685691 is about 8757.0366563125. The cubic root of 76685691 is about 424.8524350442.

The spelling of 76685691 in words is "seventy-six million, six hundred eighty-five thousand, six hundred ninety-one".