631663065 has 96 divisors (see below), whose sum is σ = 1253491200. Its totient is φ = 291432960.

The previous prime is 631663061. The next prime is 631663079. The reversal of 631663065 is 560366136.

It is a happy number.

631663065 is a `hidden beast` number, since 6 + 3 + 16 + 630 + 6 + 5 = 666.

It is not a de Polignac number, because 631663065 - 2² = 631663061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631663061) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1133767 + ... + 1134323.

It is an arithmetic number, because the mean of its divisors is an integer number (13057200).

Almost surely, 2^631663065 is an apocalyptic number.

It is an amenable number.

631663065 is a deficient number, since it is larger than the sum of its proper divisors (621828135).

631663065 is a wasteful number, since it uses less digits than its factorization.

631663065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 631663065 is about 25132.9080092217. The cubic root of 631663065 is about 858.0155546759.

The spelling of 631663065 in words is "six hundred thirty-one million, six hundred sixty-three thousand, sixty-five".