6979664 has 20 divisors (see below), whose sum is σ = 13570560. Its totient is φ = 3477600.

The previous prime is 6979663. The next prime is 6979667. The reversal of 6979664 is 4669796.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6979663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5489 + ... + 6639.

It is an arithmetic number, because the mean of its divisors is an integer number (678528).

Almost surely, 2^6979664 is an apocalyptic number.

It is an amenable number.

6979664 is a deficient number, since it is larger than the sum of its proper divisors (6590896).

6979664 is a wasteful number, since it uses less digits than its factorization.

6979664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538 (or 1532 counting only the distinct ones).

The product of its digits is 489888, while the sum is 47.

The square root of 6979664 is about 2641.9053730215. The cubic root of 6979664 is about 191.1076939877.

The spelling of 6979664 in words is "six million, nine hundred seventy-nine thousand, six hundred sixty-four".