666667333400 has 48 divisors (see below), whose sum is σ = 1550060555400. Its totient is φ = 266656782080.

The previous prime is 666667333363. The next prime is 666667333421. The reversal of 666667333400 is 4333766666.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7382924 + ... + 7472676.

Almost surely, 2^666667333400 is an apocalyptic number.

It is an amenable number.

666667333400 is an abundant number, since it is smaller than the sum of its proper divisors (883393222000).

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

666667333400 is a wasteful number, since it uses less digits than its factorization.

666667333400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126908 (or 126899 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 50.

The spelling of 666667333400 in words is "six hundred sixty-six billion, six hundred sixty-seven million, three hundred thirty-three thousand, four hundred".