6663579 has 16 divisors (see below), whose sum is σ = 9728544. Its totient is φ = 4032000.

The previous prime is 6663557. The next prime is 6663593. The reversal of 6663579 is 9753666.

It is not a de Polignac number, because 6663579 - 2⁷ = 6663451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6663579.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979 + ... + 3779.

It is an arithmetic number, because the mean of its divisors is an integer number (608034).

Almost surely, 2^6663579 is an apocalyptic number.

6663579 is a deficient number, since it is larger than the sum of its proper divisors (3064965).

6663579 is a wasteful number, since it uses less digits than its factorization.

6663579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878.

The product of its digits is 204120, while the sum is 42.

The square root of 6663579 is about 2581.3909041445. The cubic root of 6663579 is about 188.1781452335.

The spelling of 6663579 in words is "six million, six hundred sixty-three thousand, five hundred seventy-nine".