166317152399 has 8 divisors (see below), whose sum is σ = 169875807168. Its totient is φ = 162759330720.

The previous prime is 166317152389. The next prime is 166317152431. The reversal of 166317152399 is 993251713661.

166317152399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 407820²-1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166317152399 - 2⁴ = 166317152383 is a prime.

It is a super-2 number, since 2×166317152399² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166317152399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166317152369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203909 + ... + 611729.

It is an arithmetic number, because the mean of its divisors is an integer number (21234475896).

Almost surely, 2^166317152399 is an apocalyptic number.

166317152399 is a deficient number, since it is larger than the sum of its proper divisors (3558654769).

166317152399 is an equidigital number, since it uses as much as digits as its factorization.

166317152399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416545.

The product of its digits is 1837080, while the sum is 53.

The spelling of 166317152399 in words is "one hundred sixty-six billion, three hundred seventeen million, one hundred fifty-two thousand, three hundred ninety-nine".