666254675646733 has 16 divisors (see below), whose sum is σ = 680659877479680. Its totient is φ = 651859051700736.

The previous prime is 666254675646691. The next prime is 666254675646851. The reversal of 666254675646733 is 337646576452666.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666254675646733 is a prime.

It is a super-2 number, since 2×666254675646733² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666254675646733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666254675646433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9633073810 + ... + 9633142972.

It is an arithmetic number, because the mean of its divisors is an integer number (42541242342480).

Almost surely, 2^{666254675646733} is an apocalyptic number.

It is an amenable number.

666254675646733 is a deficient number, since it is larger than the sum of its proper divisors (14405201832947).

666254675646733 is a wasteful number, since it uses less digits than its factorization.

666254675646733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135396.

The product of its digits is 16460236800, while the sum is 76.

The spelling of 666254675646733 in words is "six hundred sixty-six trillion, two hundred fifty-four billion, six hundred seventy-five million, six hundred forty-six thousand, seven hundred thirty-three".