8666402265873 has 64 divisors (see below), whose sum is σ = 14407437864960. Its totient is φ = 5104015675200.

The previous prime is 8666402265811. The next prime is 8666402265887. The reversal of 8666402265873 is 3785622046668.

It is a happy number.

It is not a de Polignac number, because 8666402265873 - 2²⁰ = 8666401217297 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8666402265873.

It is not an unprimeable number, because it can be changed into a prime (8666402265173) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1377961 + ... + 4385382.

It is an arithmetic number, because the mean of its divisors is an integer number (225116216640).

Almost surely, 2^{8666402265873} is an apocalyptic number.

8666402265873 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

8666402265873 is a deficient number, since it is larger than the sum of its proper divisors (5741035599087).

8666402265873 is a wasteful number, since it uses less digits than its factorization.

8666402265873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5763507 (or 5763501 counting only the distinct ones).

The product of its (nonzero) digits is 139345920, while the sum is 63.

The spelling of 8666402265873 in words is "eight trillion, six hundred sixty-six billion, four hundred two million, two hundred sixty-five thousand, eight hundred seventy-three".