2663806889 has 4 divisors (see below), whose sum is σ = 2664809856. Its totient is φ = 2662803924.

The previous prime is 2663806867. The next prime is 2663806933. The reversal of 2663806889 is 9886083662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2663806889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2663806489) 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 3 ways as a sum of consecutive naturals, for example, 497489 + ... + 502814.

It is an arithmetic number, because the mean of its divisors is an integer number (666202464).

Almost surely, 2^2663806889 is an apocalyptic number.

It is an amenable number.

2663806889 is a deficient number, since it is larger than the sum of its proper divisors (1002967).

2663806889 is a wasteful number, since it uses less digits than its factorization.

2663806889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002966.

The product of its (nonzero) digits is 5971968, while the sum is 56.

The square root of 2663806889 is about 51612.0808435389. The cubic root of 2663806889 is about 1386.2266566195.

The spelling of 2663806889 in words is "two billion, six hundred sixty-three million, eight hundred six thousand, eight hundred eighty-nine".