51331700866 has 16 divisors (see below), whose sum is σ = 77670153504. Its totient is φ = 25442590464.

The previous prime is 51331700851. The next prime is 51331700869. The reversal of 51331700866 is 66800713315.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51331700869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125716 + ... + 344191.

It is an arithmetic number, because the mean of its divisors is an integer number (4854384594).

Almost surely, 2^51331700866 is an apocalyptic number.

51331700866 is a deficient number, since it is larger than the sum of its proper divisors (26338452638).

51331700866 is a wasteful number, since it uses less digits than its factorization.

51331700866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470385.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 51331700866 in words is "fifty-one billion, three hundred thirty-one million, seven hundred thousand, eight hundred sixty-six".