666666610516 has 24 divisors (see below), whose sum is σ = 1172976376320. Its totient is φ = 331533904800.

The previous prime is 666666610487. The next prime is 666666610559. The reversal of 666666610516 is 615016666666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360181 + ... + 1209571.

It is an arithmetic number, because the mean of its divisors is an integer number (48874015680).

Almost surely, 2^666666610516 is an apocalyptic number.

It is an amenable number.

666666610516 is a deficient number, since it is larger than the sum of its proper divisors (506309765804).

666666610516 is a wasteful number, since it uses less digits than its factorization.

666666610516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850455 (or 850453 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 55.

The spelling of 666666610516 in words is "six hundred sixty-six billion, six hundred sixty-six million, six hundred ten thousand, five hundred sixteen".