66228268 has 6 divisors (see below), whose sum is σ = 115899476. Its totient is φ = 33114132.

The previous prime is 66228259. The next prime is 66228287. The reversal of 66228268 is 86282266.

It is a self number, because there is not a number n which added to its sum of digits gives 66228268.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8278530 + ... + 8278537.

Almost surely, 2^66228268 is an apocalyptic number.

It is an amenable number.

66228268 is a deficient number, since it is larger than the sum of its proper divisors (49671208).

66228268 is a wasteful number, since it uses less digits than its factorization.

66228268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16557071 (or 16557069 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 66228268 is about 8138.0752024051. The cubic root of 66228268 is about 404.5893678758.

The spelling of 66228268 in words is "sixty-six million, two hundred twenty-eight thousand, two hundred sixty-eight".