7661052857 has 2 divisors, whose sum is σ = 7661052858. Its totient is φ = 7661052856.

The previous prime is 7661052823. The next prime is 7661052859. The reversal of 7661052857 is 7582501667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5504007721 + 2157045136 = 74189^2 + 46444^2 .

It is a cyclic number.

It is not a de Polignac number, because 7661052857 - 2⁶ = 7661052793 is a prime.

Together with 7661052859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7661052859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3830526428 + 3830526429.

It is an arithmetic number, because the mean of its divisors is an integer number (3830526429).

Almost surely, 2^7661052857 is an apocalyptic number.

It is an amenable number.

7661052857 is a deficient number, since it is larger than the sum of its proper divisors (1).

7661052857 is an equidigital number, since it uses as much as digits as its factorization.

7661052857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705600, while the sum is 47.

The square root of 7661052857 is about 87527.4405943645. The cubic root of 7661052857 is about 1971.3458347248.

The spelling of 7661052857 in words is "seven billion, six hundred sixty-one million, fifty-two thousand, eight hundred fifty-seven".