66818765631614 has 16 divisors (see below), whose sum is σ = 105503791419600. Its totient is φ = 31650851067264.

The previous prime is 66818765631601. The next prime is 66818765631701. The reversal of 66818765631614 is 41613656781866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4784204 + ... + 12511040.

It is an arithmetic number, because the mean of its divisors is an integer number (6593986963725).

Almost surely, 2^{66818765631614} is an apocalyptic number.

66818765631614 is a deficient number, since it is larger than the sum of its proper divisors (38685025787986).

66818765631614 is a wasteful number, since it uses less digits than its factorization.

66818765631614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7954427.

The product of its digits is 209018880, while the sum is 68.

The spelling of 66818765631614 in words is "sixty-six trillion, eight hundred eighteen billion, seven hundred sixty-five million, six hundred thirty-one thousand, six hundred fourteen".