6668431 has 12 divisors (see below), whose sum is σ = 8377936. Its totient is φ = 5195520.

The previous prime is 6668429. The next prime is 6668447. The reversal of 6668431 is 1348666.

It is not a de Polignac number, because 6668431 - 2¹ = 6668429 is a prime.

It is a super-2 number, since 2×6668431² = 88935944003522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3090 + ... + 4783.

Almost surely, 2^6668431 is an apocalyptic number.

6668431 is a deficient number, since it is larger than the sum of its proper divisors (1709505).

6668431 is a wasteful number, since it uses less digits than its factorization.

6668431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7902 (or 7891 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 6668431 is about 2582.3305365503. The cubic root of 6668431 is about 188.2238073241.

The spelling of 6668431 in words is "six million, six hundred sixty-eight thousand, four hundred thirty-one".