66195208 has 8 divisors (see below), whose sum is σ = 124116030. Its totient is φ = 33097600.

The previous prime is 66195203. The next prime is 66195277. The reversal of 66195208 is 80259166.

It can be written as a sum of positive squares in only one way, i.e., 34363044 + 31832164 = 5862^2 + 5642^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (66195203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4137193 + ... + 4137208.

Almost surely, 2^66195208 is an apocalyptic number.

It is an amenable number.

66195208 is a deficient number, since it is larger than the sum of its proper divisors (57920822).

66195208 is a wasteful number, since it uses less digits than its factorization.

66195208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8274407 (or 8274403 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 66195208 is about 8136.0437560279. The cubic root of 66195208 is about 404.5220353446.

The spelling of 66195208 in words is "sixty-six million, one hundred ninety-five thousand, two hundred eight".