630667631 has 8 divisors (see below), whose sum is σ = 688552704. Its totient is φ = 572874520.

The previous prime is 630667621. The next prime is 630667633. The reversal of 630667631 is 136766036.

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 630667631 - 2¹⁰ = 630666607 is a prime.

It is a super-2 number, since 2×630667631² = 795483321582304322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630667633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8231 + ... + 36456.

It is an arithmetic number, because the mean of its divisors is an integer number (86069088).

Almost surely, 2^630667631 is an apocalyptic number.

630667631 is a deficient number, since it is larger than the sum of its proper divisors (57885073).

630667631 is a wasteful number, since it uses less digits than its factorization.

630667631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45981.

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 630667631 is about 25113.0968022663. The cubic root of 630667631 is about 857.5646038699.

It can be divided in two parts, 6306 and 67631, that added together give a palindrome (73937).

The spelling of 630667631 in words is "six hundred thirty million, six hundred sixty-seven thousand, six hundred thirty-one".