666023472 has 100 divisors (see below), whose sum is σ = 1934525736. Its totient is φ = 221218560.

The previous prime is 666023461. The next prime is 666023497. The reversal of 666023472 is 274320666.

It is a happy number.

666023472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 448972 + ... + 450452.

Almost surely, 2^666023472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666023472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (967262868).

666023472 is an abundant number, since it is smaller than the sum of its proper divisors (1268502264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666023472 is a wasteful number, since it uses less digits than its factorization.

666023472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848 (or 1833 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 666023472 is about 25807.4305578839. The cubic root of 666023472 is about 873.2994331900.

The spelling of 666023472 in words is "six hundred sixty-six million, twenty-three thousand, four hundred seventy-two".