6656697 has 6 divisors (see below), whose sum is σ = 9615242. Its totient is φ = 4437792.

The previous prime is 6656659. The next prime is 6656711. The reversal of 6656697 is 7966566.

It can be written as a sum of positive squares in only one way, i.e., 6610041 + 46656 = 2571^2 + 216^2 .

It is not a de Polignac number, because 6656697 - 2⁷ = 6656569 is a prime.

It is a super-2 number, since 2×6656697² = 88623229899618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6656627) 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, 369808 + ... + 369825.

Almost surely, 2^6656697 is an apocalyptic number.

It is an amenable number.

6656697 is a deficient number, since it is larger than the sum of its proper divisors (2958545).

6656697 is a wasteful number, since it uses less digits than its factorization.

6656697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739639 (or 739636 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 6656697 is about 2580.0575574975. The cubic root of 6656697 is about 188.1133408152.

The spelling of 6656697 in words is "six million, six hundred fifty-six thousand, six hundred ninety-seven".