6698557 has 2 divisors, whose sum is σ = 6698558. Its totient is φ = 6698556.

The previous prime is 6698551. The next prime is 6698567. The reversal of 6698557 is 7558966.

6698557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6255001 + 443556 = 2501^2 + 666^2 .

It is a cyclic number.

It is not a de Polignac number, because 6698557 - 2⁷ = 6698429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6698551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3349278 + 3349279.

It is an arithmetic number, because the mean of its divisors is an integer number (3349279).

Almost surely, 2^6698557 is an apocalyptic number.

It is an amenable number.

6698557 is a deficient number, since it is larger than the sum of its proper divisors (1).

6698557 is an equidigital number, since it uses as much as digits as its factorization.

6698557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 46.

The square root of 6698557 is about 2588.1570663312. The cubic root of 6698557 is about 188.5068280565.

The spelling of 6698557 in words is "six million, six hundred ninety-eight thousand, five hundred fifty-seven".