51630664 has 16 divisors (see below), whose sum is σ = 98449200. Its totient is φ = 25377552.

The previous prime is 51630647. The next prime is 51630679. The reversal of 51630664 is 46603615.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54222 + ... + 55165.

It is an arithmetic number, because the mean of its divisors is an integer number (6153075).

Almost surely, 2^51630664 is an apocalyptic number.

It is an amenable number.

51630664 is a deficient number, since it is larger than the sum of its proper divisors (46818536).

51630664 is a wasteful number, since it uses less digits than its factorization.

51630664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109452 (or 109448 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 51630664 is about 7185.4480723195. The cubic root of 51630664 is about 372.3653288533.

The spelling of 51630664 in words is "fifty-one million, six hundred thirty thousand, six hundred sixty-four".