666426063715 has 32 divisors (see below), whose sum is σ = 843565881600. Its totient is φ = 504023160960.

The previous prime is 666426063671. The next prime is 666426063733. The reversal of 666426063715 is 517360624666.

It is not a de Polignac number, because 666426063715 - 2⁷ = 666426063587 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143531184 + ... + 143535826.

It is an arithmetic number, because the mean of its divisors is an integer number (26361433800).

Almost surely, 2^666426063715 is an apocalyptic number.

666426063715 is a deficient number, since it is larger than the sum of its proper divisors (177139817885).

666426063715 is a wasteful number, since it uses less digits than its factorization.

666426063715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7507.

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 666426063715 in words is "six hundred sixty-six billion, four hundred twenty-six million, sixty-three thousand, seven hundred fifteen".