631707661 has 8 divisors (see below), whose sum is σ = 689883264. Its totient is φ = 574901040.

The previous prime is 631707653. The next prime is 631707679. The reversal of 631707661 is 166707136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631707661 - 2³ = 631707653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631707661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631707161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341281 + ... + 343126.

It is an arithmetic number, because the mean of its divisors is an integer number (86235408).

Almost surely, 2^631707661 is an apocalyptic number.

It is an amenable number.

631707661 is a deficient number, since it is larger than the sum of its proper divisors (58175603).

631707661 is a wasteful number, since it uses less digits than its factorization.

631707661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684491.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 631707661 is about 25133.7951969057. The cubic root of 631707661 is about 858.0357464328.

The spelling of 631707661 in words is "six hundred thirty-one million, seven hundred seven thousand, six hundred sixty-one".