631661334 has 16 divisors (see below), whose sum is σ = 1294135920. Its totient is φ = 205418240.

The previous prime is 631661309. The next prime is 631661347. The reversal of 631661334 is 433166136.

It is a junction number, because it is equal to n+sod(n) for n = 631661295 and 631661304.

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, 1283619 + ... + 1284110.

It is an arithmetic number, because the mean of its divisors is an integer number (80883495).

Almost surely, 2^631661334 is an apocalyptic number.

631661334 is an abundant number, since it is smaller than the sum of its proper divisors (662474586).

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

631661334 is a wasteful number, since it uses less digits than its factorization.

631661334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567775.

The product of its digits is 23328, while the sum is 33.

The square root of 631661334 is about 25132.8735722758. The cubic root of 631661334 is about 858.0147709108.

The spelling of 631661334 in words is "six hundred thirty-one million, six hundred sixty-one thousand, three hundred thirty-four".