631666136 has 16 divisors (see below), whose sum is σ = 1186755000. Its totient is φ = 315198144.

The previous prime is 631666129. The next prime is 631666141.

631666136 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 631666136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75125 + ... + 83108.

Almost surely, 2^631666136 is an apocalyptic number.

It is an amenable number.

631666136 is a deficient number, since it is larger than the sum of its proper divisors (555088864).

631666136 is a wasteful number, since it uses less digits than its factorization.

631666136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158738 (or 158734 counting only the distinct ones).

The product of its digits is 69984, while the sum is 38.

The square root of 631666136 is about 25132.9691043458. The cubic root of 631666136 is about 858.0169451648.

The spelling of 631666136 in words is "six hundred thirty-one million, six hundred sixty-six thousand, one hundred thirty-six".