7714668557257 has 2 divisors, whose sum is σ = 7714668557258. Its totient is φ = 7714668557256.

The previous prime is 7714668557231. The next prime is 7714668557291. The reversal of 7714668557257 is 7527558664177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6027633855376 + 1687034701881 = 2455124^2 + 1298859^2 .

It is a cyclic number.

It is not a de Polignac number, because 7714668557257 - 2⁷ = 7714668557129 is a prime.

It is a super-2 number, since 2×7714668557257² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7714668557207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3857334278628 + 3857334278629.

It is an arithmetic number, because the mean of its divisors is an integer number (3857334278629).

Almost surely, 2^{7714668557257} is an apocalyptic number.

It is an amenable number.

7714668557257 is a deficient number, since it is larger than the sum of its proper divisors (1).

7714668557257 is an equidigital number, since it uses as much as digits as its factorization.

7714668557257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691488000, while the sum is 70.

The spelling of 7714668557257 in words is "seven trillion, seven hundred fourteen billion, six hundred sixty-eight million, five hundred fifty-seven thousand, two hundred fifty-seven".