66871164 has 48 divisors (see below), whose sum is σ = 160876800. Its totient is φ = 21605760.

The previous prime is 66871163. The next prime is 66871193. The reversal of 66871164 is 46117866.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66871163) 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, 97567 + ... + 98249.

It is an arithmetic number, because the mean of its divisors is an integer number (3351600).

Almost surely, 2^66871164 is an apocalyptic number.

It is an amenable number.

66871164 is an abundant number, since it is smaller than the sum of its proper divisors (94005636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66871164 is a wasteful number, since it uses less digits than its factorization.

66871164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930 (or 928 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 66871164 is about 8177.4790736510. The cubic root of 66871164 is about 405.8943078678.

The spelling of 66871164 in words is "sixty-six million, eight hundred seventy-one thousand, one hundred sixty-four".