66872084 has 24 divisors (see below), whose sum is σ = 127911168. Its totient is φ = 30453120.

The previous prime is 66872081. The next prime is 66872093. The reversal of 66872084 is 48027866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66872081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13754 + ... + 17969.

It is an arithmetic number, because the mean of its divisors is an integer number (5329632).

Almost surely, 2^66872084 is an apocalyptic number.

It is an amenable number.

66872084 is a deficient number, since it is larger than the sum of its proper divisors (61039084).

66872084 is a wasteful number, since it uses less digits than its factorization.

66872084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31775 (or 31773 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 66872084 is about 8177.5353255122. The cubic root of 66872084 is about 405.8961692633.

The spelling of 66872084 in words is "sixty-six million, eight hundred seventy-two thousand, eighty-four".