6668631 has 12 divisors (see below), whose sum is σ = 9690408. Its totient is φ = 4419024.

The previous prime is 6668617. The next prime is 6668659. The reversal of 6668631 is 1368666.

It is not a de Polignac number, because 6668631 - 2⁶ = 6668567 is a prime.

It is a super-2 number, since 2×6668631² = 88941278828322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 585 + ... + 3698.

It is an arithmetic number, because the mean of its divisors is an integer number (807534).

Almost surely, 2^6668631 is an apocalyptic number.

6668631 is a deficient number, since it is larger than the sum of its proper divisors (3021777).

6668631 is a wasteful number, since it uses less digits than its factorization.

6668631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462 (or 4459 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 6668631 is about 2582.3692609695. The cubic root of 6668631 is about 188.2256890454.

The spelling of 6668631 in words is "six million, six hundred sixty-eight thousand, six hundred thirty-one".