6915664 has 30 divisors (see below), whose sum is σ = 15588474. Its totient is φ = 2963520.

The previous prime is 6915661. The next prime is 6915683. The reversal of 6915664 is 4665196.

It can be written as a sum of positive squares in only one way, i.e., 6210064 + 705600 = 2492^2 + 840^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6915661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3627 + ... + 5194.

Almost surely, 2^6915664 is an apocalyptic number.

It is an amenable number.

6915664 is an abundant number, since it is smaller than the sum of its proper divisors (8672810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6915664 is a wasteful number, since it uses less digits than its factorization.

6915664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8843 (or 8830 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 6915664 is about 2629.7650085131. The cubic root of 6915664 is about 190.5217790721.

The spelling of 6915664 in words is "six million, nine hundred fifteen thousand, six hundred sixty-four".