666213150564 has 96 divisors (see below), whose sum is σ = 1868066403840. Its totient is φ = 204108781824.

The previous prime is 666213150517. The next prime is 666213150571. The reversal of 666213150564 is 465051312666.

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 31 ways as a sum of consecutive naturals, for example, 691132 + ... + 1345395.

It is an arithmetic number, because the mean of its divisors is an integer number (19459025040).

Almost surely, 2^666213150564 is an apocalyptic number.

It is an amenable number.

666213150564 is an abundant number, since it is smaller than the sum of its proper divisors (1201853253276).

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

666213150564 is a wasteful number, since it uses less digits than its factorization.

666213150564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036786 (or 2036778 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 666213150564 in words is "six hundred sixty-six billion, two hundred thirteen million, one hundred fifty thousand, five hundred sixty-four".