6640336966 has 8 divisors (see below), whose sum is σ = 9963397080. Its totient is φ = 3319204608.

The previous prime is 6640336943. The next prime is 6640337027. The reversal of 6640336966 is 6696330466.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473296 + ... + 487123.

It is an arithmetic number, because the mean of its divisors is an integer number (1245424635).

Almost surely, 2^6640336966 is an apocalyptic number.

6640336966 is a deficient number, since it is larger than the sum of its proper divisors (3323060114).

6640336966 is a wasteful number, since it uses less digits than its factorization.

6640336966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963878.

The product of its (nonzero) digits is 2519424, while the sum is 49.

The square root of 6640336966 is about 81488.2627499200. The cubic root of 6640336966 is about 1879.5910690095.

The spelling of 6640336966 in words is "six billion, six hundred forty million, three hundred thirty-six thousand, nine hundred sixty-six".