6656297 has 4 divisors (see below), whose sum is σ = 6662916. Its totient is φ = 6649680.

The previous prime is 6656291. The next prime is 6656311. The reversal of 6656297 is 7926566.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7926566 = 2 ⋅3963283.

It can be written as a sum of positive squares in 2 ways, for example, as 3625216 + 3031081 = 1904^2 + 1741^2 .

It is a cyclic number.

It is not a de Polignac number, because 6656297 - 2¹⁰ = 6655273 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6656291) 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, 1454 + ... + 3927.

It is an arithmetic number, because the mean of its divisors is an integer number (1665729).

Almost surely, 2^6656297 is an apocalyptic number.

It is an amenable number.

6656297 is a deficient number, since it is larger than the sum of its proper divisors (6619).

6656297 is a wasteful number, since it uses less digits than its factorization.

6656297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6618.

The product of its digits is 136080, while the sum is 41.

The square root of 6656297 is about 2579.9800386825. The cubic root of 6656297 is about 188.1095728382.

The spelling of 6656297 in words is "six million, six hundred fifty-six thousand, two hundred ninety-seven".