166872513886 has 64 divisors (see below), whose sum is σ = 273865173120. Its totient is φ = 75802521600.

The previous prime is 166872513881. The next prime is 166872513917. The reversal of 166872513886 is 688315278661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166872513881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 281403606 + ... + 281404198.

It is an arithmetic number, because the mean of its divisors is an integer number (4279143330).

Almost surely, 2^166872513886 is an apocalyptic number.

166872513886 is a deficient number, since it is larger than the sum of its proper divisors (106992659234).

166872513886 is a wasteful number, since it uses less digits than its factorization.

166872513886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301.

The product of its digits is 23224320, while the sum is 61.

The spelling of 166872513886 in words is "one hundred sixty-six billion, eight hundred seventy-two million, five hundred thirteen thousand, eight hundred eighty-six".