166114621465625 has 36 divisors (see below), whose sum is σ = 241528761380844. Its totient is φ = 113907168900000.

The previous prime is 166114621465589. The next prime is 166114621465657. The reversal of 166114621465625 is 526564126411661.

It can be written as a sum of positive squares in 6 ways, for example, as 165806415509056 + 308205956569 = 12876584^2 + 555163^2 .

It is not a de Polignac number, because 166114621465625 - 2⁴² = 161716574954521 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 542261966 + ... + 542568215.

It is an arithmetic number, because the mean of its divisors is an integer number (6709132260579).

Almost surely, 2^{166114621465625} is an apocalyptic number.

It is an amenable number.

166114621465625 is a deficient number, since it is larger than the sum of its proper divisors (75414139915219).

166114621465625 is an frugal number, since it uses more digits than its factorization.

166114621465625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084830220 (or 1084830193 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 56.

The spelling of 166114621465625 in words is "one hundred sixty-six trillion, one hundred fourteen billion, six hundred twenty-one million, four hundred sixty-five thousand, six hundred twenty-five".