666812455360 has 56 divisors (see below), whose sum is σ = 1681249947120. Its totient is φ = 251035275264.

The previous prime is 666812455349. The next prime is 666812455427. The reversal of 666812455360 is 63554218666.

It is a junction number, because it is equal to n+sod(n) for n = 666812455298 and 666812455307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61282470 + ... + 61293349.

Almost surely, 2^666812455360 is an apocalyptic number.

It is an amenable number.

666812455360 is an abundant number, since it is smaller than the sum of its proper divisors (1014437491760).

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

666812455360 is a wasteful number, since it uses less digits than its factorization.

666812455360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122575853 (or 122575843 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 666812455360 in words is "six hundred sixty-six billion, eight hundred twelve million, four hundred fifty-five thousand, three hundred sixty".