631666733608 has 16 divisors (see below), whose sum is σ = 1184398012980. Its totient is φ = 315827263488.

The previous prime is 631666733567. The next prime is 631666733609. The reversal of 631666733608 is 806337666136.

It can be written as a sum of positive squares in 2 ways, for example, as 630337547844 + 1329185764 = 793938^2 + 36458^2 .

It is not an unprimeable number, because it can be changed into a prime (631666733609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307035 + ... + 1165162.

Almost surely, 2^631666733608 is an apocalyptic number.

It is an amenable number.

631666733608 is a deficient number, since it is larger than the sum of its proper divisors (552731279372).

631666733608 is a wasteful number, since it uses less digits than its factorization.

631666733608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525836 (or 1525832 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 55.

The spelling of 631666733608 in words is "six hundred thirty-one billion, six hundred sixty-six million, seven hundred thirty-three thousand, six hundred eight".