646630967 has 8 divisors (see below), whose sum is σ = 662869872. Its totient is φ = 630414400.

The previous prime is 646630949. The next prime is 646630979. The reversal of 646630967 is 769036646.

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

It is a cyclic number.

It is not a de Polignac number, because 646630967 - 2⁸ = 646630711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646630937) 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, 63617 + ... + 73077.

It is an arithmetic number, because the mean of its divisors is an integer number (82858734).

Almost surely, 2^646630967 is an apocalyptic number.

646630967 is a deficient number, since it is larger than the sum of its proper divisors (16238905).

646630967 is a wasteful number, since it uses less digits than its factorization.

646630967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11169.

The product of its (nonzero) digits is 979776, while the sum is 47.

The square root of 646630967 is about 25428.9395571266. The cubic root of 646630967 is about 864.7399028654.

The spelling of 646630967 in words is "six hundred forty-six million, six hundred thirty thousand, nine hundred sixty-seven".