666644576743 has 8 divisors (see below), whose sum is σ = 683603222400. Its totient is φ = 649719217920.

The previous prime is 666644576693. The next prime is 666644576753. The reversal of 666644576743 is 347675446666.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666644576743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666644576753) 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, 8281143 + ... + 8361256.

It is an arithmetic number, because the mean of its divisors is an integer number (85450402800).

Almost surely, 2^666644576743 is an apocalyptic number.

666644576743 is a deficient number, since it is larger than the sum of its proper divisors (16958645657).

666644576743 is a wasteful number, since it uses less digits than its factorization.

666644576743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16643417.

The product of its digits is 365783040, while the sum is 64.

The spelling of 666644576743 in words is "six hundred sixty-six billion, six hundred forty-four million, five hundred seventy-six thousand, seven hundred forty-three".