6663631 has 8 divisors (see below), whose sum is σ = 7207200. Its totient is φ = 6124512.

The previous prime is 6663617. The next prime is 6663647. The reversal of 6663631 is 1363666.

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 6663631 - 2⁵ = 6663599 is a prime.

It is a super-2 number, since 2×6663631² = 88807956208322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6663593 and 6663602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663611) 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, 2445 + ... + 4393.

It is an arithmetic number, because the mean of its divisors is an integer number (900900).

Almost surely, 2^6663631 is an apocalyptic number.

6663631 is a deficient number, since it is larger than the sum of its proper divisors (543569).

6663631 is a wasteful number, since it uses less digits than its factorization.

6663631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225.

The product of its digits is 11664, while the sum is 31.

The square root of 6663631 is about 2581.4009762143. The cubic root of 6663631 is about 188.1786347221.

The spelling of 6663631 in words is "six million, six hundred sixty-three thousand, six hundred thirty-one".