6664408 has 16 divisors (see below), whose sum is σ = 13231080. Its totient is φ = 3136128.

The previous prime is 6664387. The next prime is 6664417. The reversal of 6664408 is 8044666.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 24366 + ... + 24637.

Almost surely, 2^6664408 is an apocalyptic number.

6664408 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6664408 is a deficient number, since it is larger than the sum of its proper divisors (6566672).

6664408 is a wasteful number, since it uses less digits than its factorization.

6664408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49026 (or 49022 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 6664408 is about 2581.5514714993. The cubic root of 6664408 is about 188.1859485083.

The spelling of 6664408 in words is "six million, six hundred sixty-four thousand, four hundred eight".