51666230804 has 6 divisors (see below), whose sum is σ = 90415903914. Its totient is φ = 25833115400.

The previous prime is 51666230741. The next prime is 51666230813. The reversal of 51666230804 is 40803266615.

It can be written as a sum of positive squares in only one way, i.e., 49349733904 + 2316496900 = 222148^2 + 48130^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6458278847 + ... + 6458278854.

It is an arithmetic number, because the mean of its divisors is an integer number (15069317319).

Almost surely, 2^51666230804 is an apocalyptic number.

It is an amenable number.

51666230804 is a deficient number, since it is larger than the sum of its proper divisors (38749673110).

51666230804 is a wasteful number, since it uses less digits than its factorization.

51666230804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12916557705 (or 12916557703 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 51666230804 in words is "fifty-one billion, six hundred sixty-six million, two hundred thirty thousand, eight hundred four".