666023489 has 8 divisors (see below), whose sum is σ = 695241792. Its totient is φ = 636826960.

The previous prime is 666023461. The next prime is 666023497. The reversal of 666023489 is 984320666.

666023489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666023489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (666023419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104807 + ... + 110979.

It is an arithmetic number, because the mean of its divisors is an integer number (86905224).

Almost surely, 2^666023489 is an apocalyptic number.

It is an amenable number.

666023489 is a deficient number, since it is larger than the sum of its proper divisors (29218303).

666023489 is a wasteful number, since it uses less digits than its factorization.

666023489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10887.

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 666023489 is about 25807.4308872464. The cubic root of 666023489 is about 873.2994406202.

The spelling of 666023489 in words is "six hundred sixty-six million, twenty-three thousand, four hundred eighty-nine".