666195076 has 12 divisors (see below), whose sum is σ = 1206043020. Its totient is φ = 321611360.

The previous prime is 666195073. The next prime is 666195077. The reversal of 666195076 is 670591666.

It can be written as a sum of positive squares in 2 ways, for example, as 461132676 + 205062400 = 21474^2 + 14320^2 .

It is not an unprimeable number, because it can be changed into a prime (666195073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2871415 + ... + 2871646.

It is an arithmetic number, because the mean of its divisors is an integer number (100503585).

Almost surely, 2^666195076 is an apocalyptic number.

It is an amenable number.

666195076 is a deficient number, since it is larger than the sum of its proper divisors (539847944).

666195076 is a wasteful number, since it uses less digits than its factorization.

666195076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5743094 (or 5743092 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 666195076 is about 25810.7550451357. The cubic root of 666195076 is about 873.3744299497.

The spelling of 666195076 in words is "six hundred sixty-six million, one hundred ninety-five thousand, seventy-six".