666674033400 has 72 divisors (see below), whose sum is σ = 2238913634880. Its totient is φ = 177779741760.

The previous prime is 666674033383. The next prime is 666674033413. The reversal of 666674033400 is 4330476666.

666674033400 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 185185432 + ... + 185189031.

Almost surely, 2^666674033400 is an apocalyptic number.

666674033400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666674033400 is an abundant number, since it is smaller than the sum of its proper divisors (1572239601480).

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

666674033400 is a wasteful number, since it uses less digits than its factorization.

666674033400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370374485 (or 370374473 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 45.

The spelling of 666674033400 in words is "six hundred sixty-six billion, six hundred seventy-four million, thirty-three thousand, four hundred".