666671010400 has 72 divisors (see below), whose sum is σ = 1627685743320. Its totient is φ = 266639708160.

The previous prime is 666671010389. The next prime is 666671010403. The reversal of 666671010400 is 4010176666.

It is a super-2 number, since 2×666671010400² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 666671010400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666671010403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8383627 + ... + 8462773.

It is an arithmetic number, because the mean of its divisors is an integer number (22606746435).

Almost surely, 2^666671010400 is an apocalyptic number.

It is an amenable number.

666671010400 is an abundant number, since it is smaller than the sum of its proper divisors (961014732920).

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

666671010400 is a wasteful number, since it uses less digits than its factorization.

666671010400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89696 (or 89683 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 666671010400 in words is "six hundred sixty-six billion, six hundred seventy-one million, ten thousand, four hundred".