51344766866 has 4 divisors (see below), whose sum is σ = 77017150302. Its totient is φ = 25672383432.

The previous prime is 51344766857. The next prime is 51344766917. The reversal of 51344766866 is 66866744315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27762557641 + 23582209225 = 166621^2 + 153565^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12836191715 + ... + 12836191718.

Almost surely, 2^51344766866 is an apocalyptic number.

51344766866 is a deficient number, since it is larger than the sum of its proper divisors (25672383436).

51344766866 is a wasteful number, since it uses less digits than its factorization.

51344766866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25672383435.

The product of its digits is 17418240, while the sum is 56.

The spelling of 51344766866 in words is "fifty-one billion, three hundred forty-four million, seven hundred sixty-six thousand, eight hundred sixty-six".