166438025669 has 16 divisors (see below), whose sum is σ = 168446126016. Its totient is φ = 164439072000.

The previous prime is 166438025647. The next prime is 166438025687. The reversal of 166438025669 is 966520834661.

166438025669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 166438025669 - 2¹⁶ = 166437960133 is a prime.

It is a super-2 number, since 2×166438025669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166438025869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104218379 + ... + 104219975.

It is an arithmetic number, because the mean of its divisors is an integer number (10527882876).

Almost surely, 2^166438025669 is an apocalyptic number.

It is an amenable number.

166438025669 is a deficient number, since it is larger than the sum of its proper divisors (2008100347).

166438025669 is a wasteful number, since it uses less digits than its factorization.

166438025669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3716.

The product of its (nonzero) digits is 11197440, while the sum is 56.

The spelling of 166438025669 in words is "one hundred sixty-six billion, four hundred thirty-eight million, twenty-five thousand, six hundred sixty-nine".