666245544003 has 48 divisors (see below), whose sum is σ = 1066744966560. Its totient is φ = 408536868672.

The previous prime is 666245543941. The next prime is 666245544127. The reversal of 666245544003 is 300445542666.

It is a happy number.

It is not a de Polignac number, because 666245544003 - 2⁶ = 666245543939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 666245544003.

It is not an unprimeable number, because it can be changed into a prime (666245544203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 272269126 + ... + 272271572.

It is an arithmetic number, because the mean of its divisors is an integer number (22223853470).

Almost surely, 2^666245544003 is an apocalyptic number.

666245544003 is a deficient number, since it is larger than the sum of its proper divisors (400499422557).

666245544003 is an equidigital number, since it uses as much as digits as its factorization.

666245544003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5233 (or 2780 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 45.

The spelling of 666245544003 in words is "six hundred sixty-six billion, two hundred forty-five million, five hundred forty-four thousand, three".