66925628 has 48 divisors (see below), whose sum is σ = 146893824. Its totient is φ = 25919040.

The previous prime is 66925609. The next prime is 66925633. The reversal of 66925628 is 82652966.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60125 + ... + 61227.

It is an arithmetic number, because the mean of its divisors is an integer number (3060288).

Almost surely, 2^66925628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66925628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73446912).

66925628 is an abundant number, since it is smaller than the sum of its proper divisors (79968196).

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

66925628 is a wasteful number, since it uses less digits than its factorization.

66925628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322 (or 1320 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

The square root of 66925628 is about 8180.8085175000. The cubic root of 66925628 is about 406.0044730836.

The spelling of 66925628 in words is "sixty-six million, nine hundred twenty-five thousand, six hundred twenty-eight".