666003723 has 24 divisors (see below), whose sum is σ = 1115514624. Its totient is φ = 345974640.

The previous prime is 666003707. The next prime is 666003727. The reversal of 666003723 is 327300666.

666003723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 666003723 - 2⁴ = 666003707 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (666003727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128511 + ... + 133592.

It is an arithmetic number, because the mean of its divisors is an integer number (46479776).

Almost surely, 2^666003723 is an apocalyptic number.

666003723 is a deficient number, since it is larger than the sum of its proper divisors (449510901).

666003723 is a wasteful number, since it uses less digits than its factorization.

666003723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262135 (or 262124 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 33.

The square root of 666003723 is about 25807.0479326869. The cubic root of 666003723 is about 873.2908013816.

The spelling of 666003723 in words is "six hundred sixty-six million, three thousand, seven hundred twenty-three".