166317338593 has 16 divisors (see below), whose sum is σ = 192505223680. Its totient is φ = 140736937536.

The previous prime is 166317338557. The next prime is 166317338599. The reversal of 166317338593 is 395833713661.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166317338593 is a prime.

It is a super-2 number, since 2×166317338593² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166317338599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9102655 + ... + 9120907.

It is an arithmetic number, because the mean of its divisors is an integer number (12031576480).

Almost surely, 2^166317338593 is an apocalyptic number.

It is an amenable number.

166317338593 is a deficient number, since it is larger than the sum of its proper divisors (26187885087).

166317338593 is a wasteful number, since it uses less digits than its factorization.

166317338593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34816.

The product of its digits is 7348320, while the sum is 55.

The spelling of 166317338593 in words is "one hundred sixty-six billion, three hundred seventeen million, three hundred thirty-eight thousand, five hundred ninety-three".