66195210 has 16 divisors (see below), whose sum is σ = 158868576. Its totient is φ = 17652048.

The previous prime is 66195203. The next prime is 66195277. The reversal of 66195210 is 1259166.

66195210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2206507 = 66195210 / (6 + 6 + 1 + 9 + 5 + 2 + 1 + 0).

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 7 ways as a sum of consecutive naturals, for example, 1103224 + ... + 1103283.

It is an arithmetic number, because the mean of its divisors is an integer number (9929286).

Almost surely, 2^66195210 is an apocalyptic number.

66195210 is an abundant number, since it is smaller than the sum of its proper divisors (92673366).

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

66195210 is a wasteful number, since it uses less digits than its factorization.

66195210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206517.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 66195210 is about 8136.0438789377. The cubic root of 66195210 is about 404.5220394186.

The spelling of 66195210 in words is "sixty-six million, one hundred ninety-five thousand, two hundred ten".