6638966 has 8 divisors (see below), whose sum is σ = 10201464. Its totient is φ = 3238480.

The previous prime is 6638953. The next prime is 6638977. The reversal of 6638966 is 6698366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40400 + ... + 40563.

It is an arithmetic number, because the mean of its divisors is an integer number (1275183).

Almost surely, 2^6638966 is an apocalyptic number.

6638966 is a deficient number, since it is larger than the sum of its proper divisors (3562498).

6638966 is a wasteful number, since it uses less digits than its factorization.

6638966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81006.

The product of its digits is 279936, while the sum is 44.

The square root of 6638966 is about 2576.6191026227. The cubic root of 6638966 is about 187.9461706457.

The spelling of 6638966 in words is "six million, six hundred thirty-eight thousand, nine hundred sixty-six".