6657697 has 2 divisors, whose sum is σ = 6657698.
Its totient is φ = 6657696.
The previous prime is 6657671. The next prime is 6657709. The reversal of 6657697 is 7967566.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 6471936 + 185761 = 2544^2 + 431^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-6657697 is a prime.
It is an Ulam number.
It is not a weakly prime, because it can be changed into another prime (6657667) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328848 + 3328849.
It is an arithmetic number, because the mean of its divisors is an integer number (3328849).
Almost surely, 26657697 is an apocalyptic number.
It is an amenable number.
6657697 is a deficient number, since it is larger than the sum of its proper divisors (1).
6657697 is an equidigital number, since it uses as much as digits as its factorization.
6657697 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 476280, while the sum is 46.
The square root of 6657697 is about 2580.2513443461.
The cubic root of 6657697 is about 188.1227600974.
The spelling of 6657697 in words is "six million, six hundred fifty-seven thousand, six hundred ninety-seven".