6637966 has 4 divisors (see below), whose sum is σ = 9956952. Its totient is φ = 3318982.

The previous prime is 6637957. The next prime is 6637979. The reversal of 6637966 is 6697366.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 1659490 + ... + 1659493.

It is an arithmetic number, because the mean of its divisors is an integer number (2489238).

Almost surely, 2^6637966 is an apocalyptic number.

6637966 is a deficient number, since it is larger than the sum of its proper divisors (3318986).

6637966 is a wasteful number, since it uses less digits than its factorization.

6637966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3318985.

The product of its digits is 244944, while the sum is 43.

The square root of 6637966 is about 2576.4250425735. The cubic root of 6637966 is about 187.9367336537.

The spelling of 6637966 in words is "six million, six hundred thirty-seven thousand, nine hundred sixty-six".