66325550 has 12 divisors (see below), whose sum is σ = 123365616. Its totient is φ = 26530200.

The previous prime is 66325513. The next prime is 66325579. The reversal of 66325550 is 5552366.

66325550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 663206 + ... + 663305.

It is an arithmetic number, because the mean of its divisors is an integer number (10280468).

Almost surely, 2^66325550 is an apocalyptic number.

66325550 is a deficient number, since it is larger than the sum of its proper divisors (57040066).

66325550 is a wasteful number, since it uses less digits than its factorization.

66325550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326523 (or 1326518 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 66325550 is about 8144.0499752887. The cubic root of 66325550 is about 404.7873699692.

The spelling of 66325550 in words is "sixty-six million, three hundred twenty-five thousand, five hundred fifty".