76691986 has 16 divisors (see below), whose sum is σ = 131624064. Its totient is φ = 32829984.

The previous prime is 76691969. The next prime is 76691987. The reversal of 76691986 is 68919667.

It is not an unprimeable number, because it can be changed into a prime (76691987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11811 + ... + 17113.

It is an arithmetic number, because the mean of its divisors is an integer number (8226504).

Almost surely, 2^76691986 is an apocalyptic number.

76691986 is a deficient number, since it is larger than the sum of its proper divisors (54932078).

76691986 is a wasteful number, since it uses less digits than its factorization.

76691986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6345.

The product of its digits is 979776, while the sum is 52.

The square root of 76691986 is about 8757.3960741764. The cubic root of 76691986 is about 424.8640598678.

It can be divided in two parts, 76691 and 986, that added together give a palindrome (77677).

The spelling of 76691986 in words is "seventy-six million, six hundred ninety-one thousand, nine hundred eighty-six".