86661942313 has 2 divisors, whose sum is σ = 86661942314. Its totient is φ = 86661942312.

The previous prime is 86661942307. The next prime is 86661942361. The reversal of 86661942313 is 31324916668.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56284241049 + 30377701264 = 237243^2 + 174292^2 .

It is a cyclic number.

It is not a de Polignac number, because 86661942313 - 2⁵ = 86661942281 is a prime.

It is not a weakly prime, because it can be changed into another prime (86661942113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43330971156 + 43330971157.

It is an arithmetic number, because the mean of its divisors is an integer number (43330971157).

Almost surely, 2^86661942313 is an apocalyptic number.

It is an amenable number.

86661942313 is a deficient number, since it is larger than the sum of its proper divisors (1).

86661942313 is an equidigital number, since it uses as much as digits as its factorization.

86661942313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 49.

The spelling of 86661942313 in words is "eighty-six billion, six hundred sixty-one million, nine hundred forty-two thousand, three hundred thirteen".