66872988 has 144 divisors (see below), whose sum is σ = 210974400. Its totient is φ = 17390592.

The previous prime is 66872987. The next prime is 66873013. The reversal of 66872988 is 88927866.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66872987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 448738 + ... + 448886.

It is an arithmetic number, because the mean of its divisors is an integer number (1465100).

Almost surely, 2^66872988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66872988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105487200).

66872988 is an abundant number, since it is smaller than the sum of its proper divisors (144101412).

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

66872988 is a wasteful number, since it uses less digits than its factorization.

66872988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 311 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 66872988 is about 8177.5905987033. The cubic root of 66872988 is about 405.8979982701.

The spelling of 66872988 in words is "sixty-six million, eight hundred seventy-two thousand, nine hundred eighty-eight".