166616013525 has 24 divisors (see below), whose sum is σ = 296661949920. Its totient is φ = 82026344640.

The previous prime is 166616013493. The next prime is 166616013527. The reversal of 166616013525 is 525310616661.

It is not a de Polignac number, because 166616013525 - 2⁵ = 166616013493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166616013527) 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, 85443135 + ... + 85445084.

It is an arithmetic number, because the mean of its divisors is an integer number (12360914580).

Almost surely, 2^166616013525 is an apocalyptic number.

166616013525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166616013525 is a deficient number, since it is larger than the sum of its proper divisors (130045936395).

166616013525 is a wasteful number, since it uses less digits than its factorization.

166616013525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170888245 (or 170888240 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 166616013525 in words is "one hundred sixty-six billion, six hundred sixteen million, thirteen thousand, five hundred twenty-five".