166318326369 has 24 divisors (see below), whose sum is σ = 262361316672. Its totient is φ = 100908188640.

The previous prime is 166318326353. The next prime is 166318326539. The reversal of 166318326369 is 963623813661.

166318326369 is a `hidden beast` number, since 1 + 6 + 6 + 318 + 3 + 263 + 69 = 666.

It is not a de Polignac number, because 166318326369 - 2⁴ = 166318326353 is a prime.

It is a super-2 number, since 2×166318326369² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166318326569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10002427 + ... + 10019040.

It is an arithmetic number, because the mean of its divisors is an integer number (10931721528).

Almost surely, 2^166318326369 is an apocalyptic number.

It is an amenable number.

166318326369 is a deficient number, since it is larger than the sum of its proper divisors (96042990303).

166318326369 is a wasteful number, since it uses less digits than its factorization.

166318326369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20021557 (or 20021554 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 54.

The spelling of 166318326369 in words is "one hundred sixty-six billion, three hundred eighteen million, three hundred twenty-six thousand, three hundred sixty-nine".