66280338 has 24 divisors (see below), whose sum is σ = 143769600. Its totient is φ = 22068504.

The previous prime is 66280337. The next prime is 66280349. The reversal of 66280338 is 83308266.

It is not an unprimeable number, because it can be changed into a prime (66280337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21583 + ... + 24461.

It is an arithmetic number, because the mean of its divisors is an integer number (5990400).

Almost surely, 2^66280338 is an apocalyptic number.

66280338 is an abundant number, since it is smaller than the sum of its proper divisors (77489262).

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

66280338 is a wasteful number, since it uses less digits than its factorization.

66280338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166 (or 4163 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 66280338 is about 8141.2737332680. The cubic root of 66280338 is about 404.6953722066.

The spelling of 66280338 in words is "sixty-six million, two hundred eighty thousand, three hundred thirty-eight".