51137525666 has 16 divisors (see below), whose sum is σ = 79414473600. Its totient is φ = 24667437648.

The previous prime is 51137525639. The next prime is 51137525671. The reversal of 51137525666 is 66652573115.

It is a super-3 number, since 3×51137525666³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51137525666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277130 + ... + 423173.

It is an arithmetic number, because the mean of its divisors is an integer number (4963404600).

Almost surely, 2^51137525666 is an apocalyptic number.

51137525666 is a deficient number, since it is larger than the sum of its proper divisors (28276947934).

51137525666 is a wasteful number, since it uses less digits than its factorization.

51137525666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701593.

The product of its digits is 1134000, while the sum is 47.

The spelling of 51137525666 in words is "fifty-one billion, one hundred thirty-seven million, five hundred twenty-five thousand, six hundred sixty-six".