666455413767200 has 144 divisors (see below), whose sum is σ = 1647197014831200. Its totient is φ = 263272680683520.

The previous prime is 666455413767193. The next prime is 666455413767211. The reversal of 666455413767200 is 2767314554666.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177354212 + ... + 181072988.

It is an arithmetic number, because the mean of its divisors is an integer number (11438868158550).

Almost surely, 2^{666455413767200} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666455413767200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (823598507415600).

666455413767200 is an abundant number, since it is smaller than the sum of its proper divisors (980741601064000).

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

666455413767200 is a wasteful number, since it uses less digits than its factorization.

666455413767200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721579 (or 3721566 counting only the distinct ones).

The product of its (nonzero) digits is 152409600, while the sum is 62.

The spelling of 666455413767200 in words is "six hundred sixty-six trillion, four hundred fifty-five billion, four hundred thirteen million, seven hundred sixty-seven thousand, two hundred".