660364631 has 8 divisors (see below), whose sum is σ = 676068624. Its totient is φ = 644676480.

The previous prime is 660364591. The next prime is 660364633. The reversal of 660364631 is 136463066.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660364631 is a prime.

It is a super-2 number, since 2×660364631² = 872162891751532322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660364591 and 660364600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660364633) 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, 150095 + ... + 154431.

It is an arithmetic number, because the mean of its divisors is an integer number (84508578).

Almost surely, 2^660364631 is an apocalyptic number.

660364631 is a deficient number, since it is larger than the sum of its proper divisors (15703993).

660364631 is a wasteful number, since it uses less digits than its factorization.

660364631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7921.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 660364631 is about 25697.5607986439. The cubic root of 660364631 is about 870.8190775676.

The spelling of 660364631 in words is "six hundred sixty million, three hundred sixty-four thousand, six hundred thirty-one".