166318326353 has 2 divisors, whose sum is σ = 166318326354. Its totient is φ = 166318326352.

The previous prime is 166318326323. The next prime is 166318326539. The reversal of 166318326353 is 353623813661.

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., 119693857024 + 46624469329 = 345968^2 + 215927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166318326353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166318326298 and 166318326307.

It is not a weakly prime, because it can be changed into another prime (166318326323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83159163176 + 83159163177.

It is an arithmetic number, because the mean of its divisors is an integer number (83159163177).

Almost surely, 2^166318326353 is an apocalyptic number.

It is an amenable number.

166318326353 is a deficient number, since it is larger than the sum of its proper divisors (1).

166318326353 is an equidigital number, since it uses as much as digits as its factorization.

166318326353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 47.

The spelling of 166318326353 in words is "one hundred sixty-six billion, three hundred eighteen million, three hundred twenty-six thousand, three hundred fifty-three".