6645597 has 16 divisors (see below), whose sum is σ = 10567680. Its totient is φ = 3632112.

The previous prime is 6645593. The next prime is 6645601. The reversal of 6645597 is 7955466.

It is an interprime number because it is at equal distance from previous prime (6645593) and next prime (6645601).

It is not a de Polignac number, because 6645597 - 2² = 6645593 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645593) 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, 6397 + ... + 7362.

It is an arithmetic number, because the mean of its divisors is an integer number (660480).

Almost surely, 2^6645597 is an apocalyptic number.

It is an amenable number.

6645597 is a deficient number, since it is larger than the sum of its proper divisors (3922083).

6645597 is a wasteful number, since it uses less digits than its factorization.

6645597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13792.

The product of its digits is 226800, while the sum is 42.

The square root of 6645597 is about 2577.9055452053. The cubic root of 6645597 is about 188.0087233767.

The spelling of 6645597 in words is "six million, six hundred forty-five thousand, five hundred ninety-seven".