51660516 has 24 divisors (see below), whose sum is σ = 120738240. Its totient is φ = 17192032.

The previous prime is 51660509. The next prime is 51660517. The reversal of 51660516 is 61506615.

It is not an unprimeable number, because it can be changed into a prime (51660517) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4945 + ... + 11303.

It is an arithmetic number, because the mean of its divisors is an integer number (5030760).

Almost surely, 2^51660516 is an apocalyptic number.

It is an amenable number.

51660516 is an abundant number, since it is smaller than the sum of its proper divisors (69077724).

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

51660516 is a wasteful number, since it uses less digits than its factorization.

51660516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7043 (or 7041 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 51660516 is about 7187.5250260434. The cubic root of 51660516 is about 372.4370801944.

The spelling of 51660516 in words is "fifty-one million, six hundred sixty thousand, five hundred sixteen".