666247327 has 4 divisors (see below), whose sum is σ = 667638720. Its totient is φ = 664855936.

The previous prime is 666247297. The next prime is 666247367. The reversal of 666247327 is 723742666.

It is a happy number.

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 666247327 - 2⁷ = 666247199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666247367) 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, 694978 + ... + 695935.

It is an arithmetic number, because the mean of its divisors is an integer number (166909680).

Almost surely, 2^666247327 is an apocalyptic number.

666247327 is a deficient number, since it is larger than the sum of its proper divisors (1391393).

666247327 is a wasteful number, since it uses less digits than its factorization.

666247327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391392.

The product of its digits is 508032, while the sum is 43.

The square root of 666247327 is about 25811.7672196229. The cubic root of 666247327 is about 873.3972628486.

The spelling of 666247327 in words is "six hundred sixty-six million, two hundred forty-seven thousand, three hundred twenty-seven".