66244260 has 48 divisors (see below), whose sum is σ = 195249600. Its totient is φ = 16735104.

The previous prime is 66244253. The next prime is 66244261. The reversal of 66244260 is 6244266.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (66244261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27915 + ... + 30194.

It is an arithmetic number, because the mean of its divisors is an integer number (4067700).

Almost surely, 2^66244260 is an apocalyptic number.

66244260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66244260 is an abundant number, since it is smaller than the sum of its proper divisors (129005340).

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

66244260 is a wasteful number, since it uses less digits than its factorization.

66244260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58140 (or 58138 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 66244260 is about 8139.0576850149. The cubic root of 66244260 is about 404.6219303684.

The spelling of 66244260 in words is "sixty-six million, two hundred forty-four thousand, two hundred sixty".