51636660 has 48 divisors (see below), whose sum is σ = 145223232. Its totient is φ = 13708800.

The previous prime is 51636649. The next prime is 51636677. The reversal of 51636660 is 6663615.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12675 + ... + 16245.

It is an arithmetic number, because the mean of its divisors is an integer number (3025484).

Almost surely, 2^51636660 is an apocalyptic number.

It is an amenable number.

51636660 is an abundant number, since it is smaller than the sum of its proper divisors (93586572).

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

51636660 is a wasteful number, since it uses less digits than its factorization.

51636660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824 (or 3822 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 51636660 is about 7185.8652923639. The cubic root of 51636660 is about 372.3797428721.

The spelling of 51636660 in words is "fifty-one million, six hundred thirty-six thousand, six hundred sixty".