666225583 has 2 divisors, whose sum is σ = 666225584. Its totient is φ = 666225582.

The previous prime is 666225559. The next prime is 666225601. The reversal of 666225583 is 385522666.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666225583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666228583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333112791 + 333112792.

It is an arithmetic number, because the mean of its divisors is an integer number (333112792).

Almost surely, 2^666225583 is an apocalyptic number.

666225583 is a deficient number, since it is larger than the sum of its proper divisors (1).

666225583 is an equidigital number, since it uses as much as digits as its factorization.

666225583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 43.

The square root of 666225583 is about 25811.3460129455. The cubic root of 666225583 is about 873.3877611936.

The spelling of 666225583 in words is "six hundred sixty-six million, two hundred twenty-five thousand, five hundred eighty-three".