66380244 has 24 divisors (see below), whose sum is σ = 177014208. Its totient is φ = 18965760.

The previous prime is 66380239. The next prime is 66380267. The reversal of 66380244 is 44208366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395037 + ... + 395204.

It is an arithmetic number, because the mean of its divisors is an integer number (7375592).

Almost surely, 2^66380244 is an apocalyptic number.

It is an amenable number.

66380244 is an abundant number, since it is smaller than the sum of its proper divisors (110633964).

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

66380244 is a wasteful number, since it uses less digits than its factorization.

66380244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790255 (or 790253 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 66380244 is about 8147.4071949302. The cubic root of 66380244 is about 404.8986059237.

The spelling of 66380244 in words is "sixty-six million, three hundred eighty thousand, two hundred forty-four".