2664683990865 has 96 divisors (see below), whose sum is σ = 5258940785280. Its totient is φ = 1237323921408.

The previous prime is 2664683990863. The next prime is 2664683990869. The reversal of 2664683990865 is 5680993864662.

It is not a de Polignac number, because 2664683990865 - 2¹ = 2664683990863 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2664683990793 and 2664683990802.

It is not an unprimeable number, because it can be changed into a prime (2664683990861) 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 95 ways as a sum of consecutive naturals, for example, 1995049 + ... + 3051161.

It is an arithmetic number, because the mean of its divisors is an integer number (54780633180).

Almost surely, 2^{2664683990865} is an apocalyptic number.

It is an amenable number.

2664683990865 is a deficient number, since it is larger than the sum of its proper divisors (2594256794415).

2664683990865 is a wasteful number, since it uses less digits than its factorization.

2664683990865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056383 (or 1056380 counting only the distinct ones).

The product of its (nonzero) digits is 806215680, while the sum is 72.

The spelling of 2664683990865 in words is "two trillion, six hundred sixty-four billion, six hundred eighty-three million, nine hundred ninety thousand, eight hundred sixty-five".