666622327 has 4 divisors (see below), whose sum is σ = 761854096. Its totient is φ = 571390560.

The previous prime is 666622301. The next prime is 666622387. The reversal of 666622327 is 723226666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 723226666 = 2 ⋅361613333.

It is a cyclic number.

It is not a de Polignac number, because 666622327 - 2¹⁹ = 666098039 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 666622327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666622387) 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, 47615874 + ... + 47615887.

It is an arithmetic number, because the mean of its divisors is an integer number (190463524).

Almost surely, 2^666622327 is an apocalyptic number.

666622327 is a deficient number, since it is larger than the sum of its proper divisors (95231769).

666622327 is an equidigital number, since it uses as much as digits as its factorization.

666622327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95231768.

The product of its digits is 217728, while the sum is 40.

The square root of 666622327 is about 25819.0303264859. The cubic root of 666622327 is about 873.5610971736.

The spelling of 666622327 in words is "six hundred sixty-six million, six hundred twenty-two thousand, three hundred twenty-seven".