666492464294800 has 240 divisors, whose sum is σ = 1885214944896192. Its totient is φ = 223238688307200.

The previous prime is 666492464294621. The next prime is 666492464294801. The reversal of 666492464294800 is 8492464294666.

It is a super-2 number, since 2×666492464294800² (a number of 30 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (70) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 666492464294800.

It is not an unprimeable number, because it can be changed into a prime (666492464294801) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14237062 + ... + 39187738.

Almost surely, 2^{666492464294800} 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 666492464294800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (942607472448096).

666492464294800 is an abundant number, since it is smaller than the sum of its proper divisors (1218722480601392).

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

666492464294800 is a wasteful number, since it uses less digits than its factorization.

666492464294800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24951186 (or 24951175 counting only the distinct ones).

The product of its (nonzero) digits is 859963392, while the sum is 70.

The spelling of 666492464294800 in words is "six hundred sixty-six trillion, four hundred ninety-two billion, four hundred sixty-four million, two hundred ninety-four thousand, eight hundred".