6722864 has 20 divisors (see below), whose sum is σ = 13124904. Its totient is φ = 3335808.

The previous prime is 6722861. The next prime is 6722869. The reversal of 6722864 is 4682276.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6722861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659 + ... + 3725.

Almost surely, 2^6722864 is an apocalyptic number.

It is an amenable number.

6722864 is a deficient number, since it is larger than the sum of its proper divisors (6402040).

6722864 is a wasteful number, since it uses less digits than its factorization.

6722864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3212 (or 3206 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 6722864 is about 2592.8486265110. The cubic root of 6722864 is about 188.7345638883.

The spelling of 6722864 in words is "six million, seven hundred twenty-two thousand, eight hundred sixty-four".