166532613642215 has 16 divisors (see below), whose sum is σ = 203103899089920. Its totient is φ = 131055113592480.

The previous prime is 166532613642169. The next prime is 166532613642229. The reversal of 166532613642215 is 512246316235661.

It is not a de Polignac number, because 166532613642215 - 2²⁴ = 166532596864999 is a prime.

It is a super-2 number, since 2×166532613642215² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345456131 + ... + 345937860.

It is an arithmetic number, because the mean of its divisors is an integer number (12693993693120).

Almost surely, 2^{166532613642215} is an apocalyptic number.

166532613642215 is a deficient number, since it is larger than the sum of its proper divisors (36571285447705).

166532613642215 is an equidigital number, since it uses as much as digits as its factorization.

166532613642215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691394782.

The product of its digits is 9331200, while the sum is 53.

Adding to 166532613642215 its reverse (512246316235661), we get a palindrome (678778929877876).

The spelling of 166532613642215 in words is "one hundred sixty-six trillion, five hundred thirty-two billion, six hundred thirteen million, six hundred forty-two thousand, two hundred fifteen".