6657869497 has 2 divisors, whose sum is σ = 6657869498. Its totient is φ = 6657869496.

The previous prime is 6657869489. The next prime is 6657869513. The reversal of 6657869497 is 7949687566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5181696256 + 1476173241 = 71984^2 + 38421^2 .

It is a cyclic number.

It is not a de Polignac number, because 6657869497 - 2³ = 6657869489 is a prime.

It is not a weakly prime, because it can be changed into another prime (6657869447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328934748 + 3328934749.

It is an arithmetic number, because the mean of its divisors is an integer number (3328934749).

Almost surely, 2^6657869497 is an apocalyptic number.

It is an amenable number.

6657869497 is a deficient number, since it is larger than the sum of its proper divisors (1).

6657869497 is an equidigital number, since it uses as much as digits as its factorization.

6657869497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137168640, while the sum is 67.

The square root of 6657869497 is about 81595.7688670191. The cubic root of 6657869497 is about 1881.2438479992.

The spelling of 6657869497 in words is "six billion, six hundred fifty-seven million, eight hundred sixty-nine thousand, four hundred ninety-seven".