666466365603 has 16 divisors (see below), whose sum is σ = 990414414720. Its totient is φ = 396165764736.

The previous prime is 666466365601. The next prime is 666466365619. The reversal of 666466365603 is 306563664666.

It is not a de Polignac number, because 666466365603 - 2¹ = 666466365601 is a prime.

It is a super-3 number, since 3×666466365603³ (a number of 36 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (666466365601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343892925 + ... + 343894862.

It is an arithmetic number, because the mean of its divisors is an integer number (61900900920).

Almost surely, 2^666466365603 is an apocalyptic number.

666466365603 is a deficient number, since it is larger than the sum of its proper divisors (323948049117).

666466365603 is a wasteful number, since it uses less digits than its factorization.

666466365603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687787826.

The product of its (nonzero) digits is 50388480, while the sum is 57.

The spelling of 666466365603 in words is "six hundred sixty-six billion, four hundred sixty-six million, three hundred sixty-five thousand, six hundred three".