6656479 has 6 divisors (see below), whose sum is σ = 7025640. Its totient is φ = 6305796.

The previous prime is 6656471. The next prime is 6656483. The reversal of 6656479 is 9746566.

It is not a de Polignac number, because 6656479 - 2³ = 6656471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6656471) 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, 8859 + ... + 9580.

It is an arithmetic number, because the mean of its divisors is an integer number (1170940).

Almost surely, 2^6656479 is an apocalyptic number.

6656479 is a deficient number, since it is larger than the sum of its proper divisors (369161).

6656479 is a wasteful number, since it uses less digits than its factorization.

6656479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18477 (or 18458 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The square root of 6656479 is about 2580.0153100321. The cubic root of 6656479 is about 188.1112872865. Note that the first 3 decimals are identical.

The spelling of 6656479 in words is "six million, six hundred fifty-six thousand, four hundred seventy-nine".