66916251356 has 12 divisors (see below), whose sum is σ = 119826775992. Its totient is φ = 32680029648.

The previous prime is 66916251341. The next prime is 66916251371. The reversal of 66916251356 is 65315261966.

It is an interprime number because it is at equal distance from previous prime (66916251341) and next prime (66916251371).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194523815 + ... + 194524158.

It is an arithmetic number, because the mean of its divisors is an integer number (9985564666).

Almost surely, 2^66916251356 is an apocalyptic number.

It is an amenable number.

66916251356 is a deficient number, since it is larger than the sum of its proper divisors (52910524636).

66916251356 is a wasteful number, since it uses less digits than its factorization.

66916251356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389048020 (or 389048018 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 50.

The spelling of 66916251356 in words is "sixty-six billion, nine hundred sixteen million, two hundred fifty-one thousand, three hundred fifty-six".