166845026403 has 48 divisors (see below), whose sum is σ = 266219291520. Its totient is φ = 99845692800.

The previous prime is 166845026393. The next prime is 166845026407. The reversal of 166845026403 is 304620548661.

166845026403 is a `hidden beast` number, since 1 + 6 + 6 + 84 + 502 + 64 + 0 + 3 = 666.

It is not a de Polignac number, because 166845026403 - 2⁶ = 166845026339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166845026407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19215223 + ... + 19223903.

It is an arithmetic number, because the mean of its divisors is an integer number (5546235240).

Almost surely, 2^166845026403 is an apocalyptic number.

166845026403 is a deficient number, since it is larger than the sum of its proper divisors (99374265117).

166845026403 is a wasteful number, since it uses less digits than its factorization.

166845026403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11120 (or 11117 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 166845026403 in words is "one hundred sixty-six billion, eight hundred forty-five million, twenty-six thousand, four hundred three".