6656497 has 2 divisors, whose sum is σ = 6656498. Its totient is φ = 6656496.

The previous prime is 6656483. The next prime is 6656527. The reversal of 6656497 is 7946566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4343056 + 2313441 = 2084^2 + 1521^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6656497 is a prime.

It is a super-2 number, since 2×6656497² = 88617904622018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6656437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328248 + 3328249.

It is an arithmetic number, because the mean of its divisors is an integer number (3328249).

Almost surely, 2^6656497 is an apocalyptic number.

It is an amenable number.

6656497 is a deficient number, since it is larger than the sum of its proper divisors (1).

6656497 is an equidigital number, since it uses as much as digits as its factorization.

6656497 is an evil number, because the sum of its binary digits is even.

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

The square root of 6656497 is about 2580.0187983811. The cubic root of 6656497 is about 188.1114568456. Note that the first 3 decimals are identical.

The spelling of 6656497 in words is "six million, six hundred fifty-six thousand, four hundred ninety-seven".