666244664004 has 12 divisors (see below), whose sum is σ = 1554570882704. Its totient is φ = 222081554664.

The previous prime is 666244663967. The next prime is 666244664021. The reversal of 666244664004 is 400466442666.

666244664004 is digitally balanced in base 2 and base 4, because in such bases 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 (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27760194322 + ... + 27760194345.

Almost surely, 2^666244664004 is an apocalyptic number.

It is an amenable number.

666244664004 is an abundant number, since it is smaller than the sum of its proper divisors (888326218700).

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

666244664004 is a wasteful number, since it uses less digits than its factorization.

666244664004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55520388674 (or 55520388672 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 48.

The spelling of 666244664004 in words is "six hundred sixty-six billion, two hundred forty-four million, six hundred sixty-four thousand, four".