66628364 has 24 divisors (see below), whose sum is σ = 133896000. Its totient is φ = 28691280.

The previous prime is 66628361. The next prime is 66628381. The reversal of 66628364 is 46382666.

It is not an unprimeable number, because it can be changed into a prime (66628361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39014 + ... + 40685.

It is an arithmetic number, because the mean of its divisors is an integer number (5579000).

Almost surely, 2^66628364 is an apocalyptic number.

It is an amenable number.

66628364 is an abundant number, since it is smaller than the sum of its proper divisors (67267636).

66628364 is a wasteful number, since it uses less digits than its factorization.

66628364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79733 (or 79731 counting only the distinct ones).

The product of its digits is 248832, while the sum is 41.

The square root of 66628364 is about 8162.6199225494. The cubic root of 66628364 is about 405.4024633097.

The spelling of 66628364 in words is "sixty-six million, six hundred twenty-eight thousand, three hundred sixty-four".