51839586666 has 96 divisors (see below), whose sum is σ = 132866697600. Its totient is φ = 14292432000.

The previous prime is 51839586653. The next prime is 51839586709. The reversal of 51839586666 is 66668593815.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9420916 + ... + 9426416.

It is an arithmetic number, because the mean of its divisors is an integer number (1384028100).

Almost surely, 2^51839586666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51839586666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66433348800).

51839586666 is an abundant number, since it is smaller than the sum of its proper divisors (81027110934).

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

51839586666 is a wasteful number, since it uses less digits than its factorization.

51839586666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8124 (or 8121 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 63.

The spelling of 51839586666 in words is "fifty-one billion, eight hundred thirty-nine million, five hundred eighty-six thousand, six hundred sixty-six".