76666731 has 8 divisors (see below), whose sum is σ = 102681600. Its totient is φ = 50881512.

The previous prime is 76666727. The next prime is 76666739. The reversal of 76666731 is 13766667.

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

It is not a de Polignac number, because 76666731 - 2² = 76666727 is a prime.

It is a super-2 number, since 2×76666731² = 11755575284452722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (76666739) 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, 56631 + ... + 57968.

It is an arithmetic number, because the mean of its divisors is an integer number (12835200).

Almost surely, 2^76666731 is an apocalyptic number.

76666731 is a deficient number, since it is larger than the sum of its proper divisors (26014869).

76666731 is a wasteful number, since it uses less digits than its factorization.

76666731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114825.

The product of its digits is 190512, while the sum is 42.

The square root of 76666731 is about 8755.9540314006. The cubic root of 76666731 is about 424.8174182285.

The spelling of 76666731 in words is "seventy-six million, six hundred sixty-six thousand, seven hundred thirty-one".