7656457657 has 2 divisors, whose sum is σ = 7656457658. Its totient is φ = 7656457656.

The previous prime is 7656457621. The next prime is 7656457663. The reversal of 7656457657 is 7567546567.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7473775401 + 182682256 = 86451^2 + 13516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7656457657 is a prime.

It is not a weakly prime, because it can be changed into another prime (7656457667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3828228828 + 3828228829.

It is an arithmetic number, because the mean of its divisors is an integer number (3828228829).

Almost surely, 2^7656457657 is an apocalyptic number.

It is an amenable number.

7656457657 is a deficient number, since it is larger than the sum of its proper divisors (1).

7656457657 is an equidigital number, since it uses as much as digits as its factorization.

7656457657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37044000, while the sum is 58.

The square root of 7656457657 is about 87501.1866033827. The cubic root of 7656457657 is about 1970.9516095300.

The spelling of 7656457657 in words is "seven billion, six hundred fifty-six million, four hundred fifty-seven thousand, six hundred fifty-seven".