66525628 has 24 divisors (see below), whose sum is σ = 129422720. Its totient is φ = 29712960.

The previous prime is 66525577. The next prime is 66525629. The reversal of 66525628 is 82652566.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66525629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19023 + ... + 22246.

Almost surely, 2^66525628 is an apocalyptic number.

It is an amenable number.

66525628 is a deficient number, since it is larger than the sum of its proper divisors (62897092).

66525628 is a wasteful number, since it uses less digits than its factorization.

66525628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41317 (or 41315 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 66525628 is about 8156.3244172850. The cubic root of 66525628 is about 405.1939892700.

The spelling of 66525628 in words is "sixty-six million, five hundred twenty-five thousand, six hundred twenty-eight".