666631305116 has 24 divisors (see below), whose sum is σ = 1403434327680. Its totient is φ = 270662334192.

The previous prime is 666631305089. The next prime is 666631305121. The reversal of 666631305116 is 611503136666.

It is a happy number.

It is a super-2 number, since 2×666631305116² (a number of 24 digits) contains 22 as substring.

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, 626532650 + ... + 626533713.

It is an arithmetic number, because the mean of its divisors is an integer number (58476430320).

Almost surely, 2^666631305116 is an apocalyptic number.

It is an amenable number.

666631305116 is an abundant number, since it is smaller than the sum of its proper divisors (736803022564).

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

666631305116 is a wasteful number, since it uses less digits than its factorization.

666631305116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253066393 (or 1253066391 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 44.

The spelling of 666631305116 in words is "six hundred sixty-six billion, six hundred thirty-one million, three hundred five thousand, one hundred sixteen".