51366366 has 32 divisors (see below), whose sum is σ = 118087200. Its totient is φ = 16531200.

The previous prime is 51366281. The next prime is 51366379. The reversal of 51366366 is 66366315.

It is a happy number.

51366366 is a `hidden beast` number, since 5 + 13 + 6 + 636 + 6 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51366366.

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, 14835 + ... + 17966.

It is an arithmetic number, because the mean of its divisors is an integer number (3690225).

Almost surely, 2^51366366 is an apocalyptic number.

51366366 is an abundant number, since it is smaller than the sum of its proper divisors (66720834).

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

51366366 is a wasteful number, since it uses less digits than its factorization.

51366366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32841 (or 32835 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 51366366 is about 7167.0332774447. The cubic root of 51366366 is about 371.7288606956.

The spelling of 51366366 in words is "fifty-one million, three hundred sixty-six thousand, three hundred sixty-six".