6557697253 has 2 divisors, whose sum is σ = 6557697254. Its totient is φ = 6557697252.

The previous prime is 6557697229. The next prime is 6557697269. The reversal of 6557697253 is 3527967556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3632834529 + 2924862724 = 60273^2 + 54082^2 .

It is a cyclic number.

It is not a de Polignac number, because 6557697253 - 2⁹ = 6557696741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6557697194 and 6557697203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6557677253) 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, 3278848626 + 3278848627.

It is an arithmetic number, because the mean of its divisors is an integer number (3278848627).

Almost surely, 2^6557697253 is an apocalyptic number.

It is an amenable number.

6557697253 is a deficient number, since it is larger than the sum of its proper divisors (1).

6557697253 is an equidigital number, since it uses as much as digits as its factorization.

6557697253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11907000, while the sum is 55.

The square root of 6557697253 is about 80979.6101064953. The cubic root of 6557697253 is about 1871.7612595079.

The spelling of 6557697253 in words is "six billion, five hundred fifty-seven million, six hundred ninety-seven thousand, two hundred fifty-three".