65318857 has 2 divisors, whose sum is σ = 65318858. Its totient is φ = 65318856.

The previous prime is 65318839. The next prime is 65318881. The reversal of 65318857 is 75881356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56010256 + 9308601 = 7484^2 + 3051^2 .

It is a cyclic number.

It is not a de Polignac number, because 65318857 - 2²³ = 56930249 is a prime.

It is not a weakly prime, because it can be changed into another prime (65318887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32659428 + 32659429.

It is an arithmetic number, because the mean of its divisors is an integer number (32659429).

Almost surely, 2^65318857 is an apocalyptic number.

It is an amenable number.

65318857 is a deficient number, since it is larger than the sum of its proper divisors (1).

65318857 is an equidigital number, since it uses as much as digits as its factorization.

65318857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 43.

The square root of 65318857 is about 8082.0082281572. The cubic root of 65318857 is about 402.7289583756.

The spelling of 65318857 in words is "sixty-five million, three hundred eighteen thousand, eight hundred fifty-seven".