666074699 has 4 divisors (see below), whose sum is σ = 672669600. Its totient is φ = 659479800.

The previous prime is 666074611. The next prime is 666074719. The reversal of 666074699 is 996470666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 666074699 - 2²⁸ = 397639243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666074699.

It is not an unprimeable number, because it can be changed into a prime (666071699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3297299 + ... + 3297500.

It is an arithmetic number, because the mean of its divisors is an integer number (168167400).

Almost surely, 2^666074699 is an apocalyptic number.

666074699 is a deficient number, since it is larger than the sum of its proper divisors (6594901).

666074699 is a wasteful number, since it uses less digits than its factorization.

666074699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6594900.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The square root of 666074699 is about 25808.4230242764. The cubic root of 666074699 is about 873.3218224726.

The spelling of 666074699 in words is "six hundred sixty-six million, seventy-four thousand, six hundred ninety-nine".