666456057124000 has 384 divisors, whose sum is σ = 1924884187349760. Its totient is φ = 223574303232000.

The previous prime is 666456057123931. The next prime is 666456057124009. The reversal of 666456057124000 is 421750654666.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (666456057124009) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 977207119 + ... + 977888881.

It is an arithmetic number, because the mean of its divisors is an integer number (5012719237890).

Almost surely, 2^{666456057124000} 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 666456057124000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962442093674880).

666456057124000 is an abundant number, since it is smaller than the sum of its proper divisors (1258428130225760).

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

666456057124000 is a wasteful number, since it uses less digits than its factorization.

666456057124000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683521 (or 683503 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 52.

The spelling of 666456057124000 in words is "six hundred sixty-six trillion, four hundred fifty-six billion, fifty-seven million, one hundred twenty-four thousand".