76663431 has 12 divisors (see below), whose sum is σ = 119254408. Its totient is φ = 47177424.

The previous prime is 76663409. The next prime is 76663459. The reversal of 76663431 is 13436667.

It is a happy number.

It is not a de Polignac number, because 76663431 - 2⁷ = 76663303 is a prime.

It is a super-2 number, since 2×76663431² = 11754563305383522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76663231) 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, 327505 + ... + 327738.

Almost surely, 2^76663431 is an apocalyptic number.

76663431 is a deficient number, since it is larger than the sum of its proper divisors (42590977).

76663431 is a wasteful number, since it uses less digits than its factorization.

76663431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655262 (or 655259 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 76663431 is about 8755.7655861723. The cubic root of 76663431 is about 424.8113229397.

The spelling of 76663431 in words is "seventy-six million, six hundred sixty-three thousand, four hundred thirty-one".