66164870 has 32 divisors (see below), whose sum is σ = 122670720. Its totient is φ = 25683840.

The previous prime is 66164803. The next prime is 66164873. The reversal of 66164870 is 7846166.

66164870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66164873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47504 + ... + 48876.

It is an arithmetic number, because the mean of its divisors is an integer number (3833460).

Almost surely, 2^66164870 is an apocalyptic number.

66164870 is a deficient number, since it is larger than the sum of its proper divisors (56505850).

66164870 is a wasteful number, since it uses less digits than its factorization.

66164870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 66164870 is about 8134.1791226896. The cubic root of 66164870 is about 404.4602269186.

The spelling of 66164870 in words is "sixty-six million, one hundred sixty-four thousand, eight hundred seventy".