166863838042925 has 24 divisors (see below), whose sum is σ = 208123491577344. Its totient is φ = 132709853352960.

The previous prime is 166863838042897. The next prime is 166863838042931. The reversal of 166863838042925 is 529240838368661.

It is not a de Polignac number, because 166863838042925 - 2¹⁴ = 166863838026541 is a prime.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4504397 + ... + 18815346.

It is an arithmetic number, because the mean of its divisors is an integer number (8671812149056).

Almost surely, 2^{166863838042925} is an apocalyptic number.

It is an amenable number.

166863838042925 is a deficient number, since it is larger than the sum of its proper divisors (41259653534419).

166863838042925 is a wasteful number, since it uses less digits than its factorization.

166863838042925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23321429 (or 23321424 counting only the distinct ones).

The product of its (nonzero) digits is 716636160, while the sum is 71.

The spelling of 166863838042925 in words is "one hundred sixty-six trillion, eight hundred sixty-three billion, eight hundred thirty-eight million, forty-two thousand, nine hundred twenty-five".