51665008 has 20 divisors (see below), whose sum is σ = 103553640. Its totient is φ = 24941504.

The previous prime is 51664993. The next prime is 51665011. The reversal of 51665008 is 80056615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55210 + ... + 56137.

It is an arithmetic number, because the mean of its divisors is an integer number (5177682).

Almost surely, 2^51665008 is an apocalyptic number.

51665008 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

51665008 is an abundant number, since it is smaller than the sum of its proper divisors (51888632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51665008 is a wasteful number, since it uses less digits than its factorization.

51665008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111384 (or 111378 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 51665008 is about 7187.8375051193. The cubic root of 51665008 is about 372.4478746335.

The spelling of 51665008 in words is "fifty-one million, six hundred sixty-five thousand, eight".