66396880497812 has 12 divisors (see below), whose sum is σ = 116206977470976. Its totient is φ = 33194886934680.

The previous prime is 66396880497803. The next prime is 66396880497851. The reversal of 66396880497812 is 21879408869366.

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, 888286514 + ... + 888361257.

It is an arithmetic number, because the mean of its divisors is an integer number (9683914789248).

Almost surely, 2^{66396880497812} is an apocalyptic number.

It is an amenable number.

66396880497812 is a deficient number, since it is larger than the sum of its proper divisors (49810096973164).

66396880497812 is a wasteful number, since it uses less digits than its factorization.

66396880497812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776657118 (or 1776657116 counting only the distinct ones).

The product of its (nonzero) digits is 1504935936, while the sum is 77.

The spelling of 66396880497812 in words is "sixty-six trillion, three hundred ninety-six billion, eight hundred eighty million, four hundred ninety-seven thousand, eight hundred twelve".