6622664 has 8 divisors (see below), whose sum is σ = 12417510. Its totient is φ = 3311328.

The previous prime is 6622663. The next prime is 6622703. The reversal of 6622664 is 4662266.

It can be written as a sum of positive squares in only one way, i.e., 3833764 + 2788900 = 1958^2 + 1670^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 6622664.

It is not an unprimeable number, because it can be changed into a prime (6622661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413909 + ... + 413924.

Almost surely, 2^6622664 is an apocalyptic number.

It is an amenable number.

6622664 is a deficient number, since it is larger than the sum of its proper divisors (5794846).

6622664 is a wasteful number, since it uses less digits than its factorization.

6622664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827839 (or 827835 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 6622664 is about 2573.4537104832. The cubic root of 6622664 is about 187.7922104405.

The spelling of 6622664 in words is "six million, six hundred twenty-two thousand, six hundred sixty-four".