166023416323625 has 128 divisors (see below), whose sum is σ = 256021582602240. Its totient is φ = 105029350483200.

The previous prime is 166023416323573. The next prime is 166023416323651. The reversal of 166023416323625 is 526323614320661.

It is a happy number.

It is not a de Polignac number, because 166023416323625 - 2¹⁰ = 166023416322601 is a prime.

It is a super-2 number, since 2×166023416323625² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 61611782 + ... + 64249968.

It is an arithmetic number, because the mean of its divisors is an integer number (2000168614080).

Almost surely, 2^{166023416323625} is an apocalyptic number.

It is an amenable number.

166023416323625 is a deficient number, since it is larger than the sum of its proper divisors (89998166278615).

166023416323625 is a wasteful number, since it uses less digits than its factorization.

166023416323625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638344 (or 2638334 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 50.

The spelling of 166023416323625 in words is "one hundred sixty-six trillion, twenty-three billion, four hundred sixteen million, three hundred twenty-three thousand, six hundred twenty-five".