663922931 has 8 divisors (see below), whose sum is σ = 779276640. Its totient is φ = 553696128.

The previous prime is 663922901. The next prime is 663922937. The reversal of 663922931 is 139229366.

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 663922931 - 2⁶ = 663922867 is a prime.

It is a super-2 number, since 2×663922931² = 881587316615261522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663922937) 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, 1281446 + ... + 1281963.

It is an arithmetic number, because the mean of its divisors is an integer number (97409580).

Almost surely, 2^663922931 is an apocalyptic number.

663922931 is a deficient number, since it is larger than the sum of its proper divisors (115353709).

663922931 is a wasteful number, since it uses less digits than its factorization.

663922931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563453.

The product of its digits is 104976, while the sum is 41.

The square root of 663922931 is about 25766.7019814333. The cubic root of 663922931 is about 872.3803799303.

The spelling of 663922931 in words is "six hundred sixty-three million, nine hundred twenty-two thousand, nine hundred thirty-one".