666202403 has 8 divisors (see below), whose sum is σ = 669708000. Its totient is φ = 662706688.

The previous prime is 666202391. The next prime is 666202417. The reversal of 666202403 is 304202666.

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

It is a cyclic number.

It is not a de Polignac number, because 666202403 - 2¹⁰ = 666201379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666202423) 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, 159125 + ... + 163257.

It is an arithmetic number, because the mean of its divisors is an integer number (83713500).

Almost surely, 2^666202403 is an apocalyptic number.

666202403 is a deficient number, since it is larger than the sum of its proper divisors (3505597).

666202403 is a wasteful number, since it uses less digits than its factorization.

666202403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4941.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 666202403 is about 25810.8969817014. The cubic root of 666202403 is about 873.3776318102.

The spelling of 666202403 in words is "six hundred sixty-six million, two hundred two thousand, four hundred three".