631666733612 has 6 divisors (see below), whose sum is σ = 1105416783828. Its totient is φ = 315833366804.

The previous prime is 631666733609. The next prime is 631666733623. The reversal of 631666733612 is 216337666136.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78958341698 + ... + 78958341705.

It is an arithmetic number, because the mean of its divisors is an integer number (184236130638).

Almost surely, 2^631666733612 is an apocalyptic number.

It is an amenable number.

631666733612 is a deficient number, since it is larger than the sum of its proper divisors (473750050216).

631666733612 is a wasteful number, since it uses less digits than its factorization.

631666733612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157916683407 (or 157916683405 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 50.

The spelling of 631666733612 in words is "six hundred thirty-one billion, six hundred sixty-six million, seven hundred thirty-three thousand, six hundred twelve".