318666865997 has 2 divisors, whose sum is σ = 318666865998. Its totient is φ = 318666865996.

The previous prime is 318666865987. The next prime is 318666866081. The reversal of 318666865997 is 799568666813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242045304361 + 76621561636 = 491981^2 + 276806^2 .

It is a cyclic number.

It is not a de Polignac number, because 318666865997 - 2¹⁰ = 318666864973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318666865987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159333432998 + 159333432999.

It is an arithmetic number, because the mean of its divisors is an integer number (159333432999).

Almost surely, 2^318666865997 is an apocalyptic number.

It is an amenable number.

318666865997 is a deficient number, since it is larger than the sum of its proper divisors (1).

318666865997 is an equidigital number, since it uses as much as digits as its factorization.

318666865997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705438720, while the sum is 74.

The spelling of 318666865997 in words is "three hundred eighteen billion, six hundred sixty-six million, eight hundred sixty-five thousand, nine hundred ninety-seven".