666623325 has 48 divisors (see below), whose sum is σ = 1131284736. Its totient is φ = 346214400.

The previous prime is 666623317. The next prime is 666623333. The reversal of 666623325 is 523326666.

It is an interprime number because it is at equal distance from previous prime (666623317) and next prime (666623333).

It is not a de Polignac number, because 666623325 - 2³ = 666623317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 990189 + ... + 990861.

It is an arithmetic number, because the mean of its divisors is an integer number (23568432).

Almost surely, 2^666623325 is an apocalyptic number.

It is an amenable number.

666623325 is a deficient number, since it is larger than the sum of its proper divisors (464661411).

666623325 is a wasteful number, since it uses less digits than its factorization.

666623325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014 (or 1009 counting only the distinct ones).

The product of its digits is 233280, while the sum is 39.

The square root of 666623325 is about 25819.0496533083. The cubic root of 666623325 is about 873.5615331094.

The spelling of 666623325 in words is "six hundred sixty-six million, six hundred twenty-three thousand, three hundred twenty-five".