66195877 has 16 divisors (see below), whose sum is σ = 74289600. Its totient is φ = 58464000.

The previous prime is 66195859. The next prime is 66195911. The reversal of 66195877 is 77859166.

66195877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66195877 - 2⁷ = 66195749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66195877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66195277) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 164877 + ... + 165277.

It is an arithmetic number, because the mean of its divisors is an integer number (4643100).

Almost surely, 2^66195877 is an apocalyptic number.

It is an amenable number.

66195877 is a deficient number, since it is larger than the sum of its proper divisors (8093723).

66195877 is a wasteful number, since it uses less digits than its factorization.

66195877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its digits is 635040, while the sum is 49.

The square root of 66195877 is about 8136.0848692722. The cubic root of 66195877 is about 404.5233981035.

The spelling of 66195877 in words is "sixty-six million, one hundred ninety-five thousand, eight hundred seventy-seven".