66225580 has 24 divisors (see below), whose sum is σ = 140001120. Its totient is φ = 26313600.

The previous prime is 66225541. The next prime is 66225581. The reversal of 66225580 is 8552266.

It is not an unprimeable number, because it can be changed into a prime (66225581) 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, 7945 + ... + 13984.

It is an arithmetic number, because the mean of its divisors is an integer number (5833380).

Almost surely, 2^66225580 is an apocalyptic number.

It is an amenable number.

66225580 is an abundant number, since it is smaller than the sum of its proper divisors (73775540).

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

66225580 is a wasteful number, since it uses less digits than its factorization.

66225580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22089 (or 22087 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 66225580 is about 8137.9100511126. The cubic root of 66225580 is about 404.5838941258.

The spelling of 66225580 in words is "sixty-six million, two hundred twenty-five thousand, five hundred eighty".