2663880965 has 16 divisors (see below), whose sum is σ = 3266312688. Its totient is φ = 2084898816.

The previous prime is 2663880941. The next prime is 2663881001. The reversal of 2663880965 is 5690883662.

2663880965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2765569 + 2661115396 = 1663^2 + 51586^2 .

It is a cyclic number.

It is not a de Polignac number, because 2663880965 - 2¹² = 2663876869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79307 + ... + 107783.

It is an arithmetic number, because the mean of its divisors is an integer number (204144543).

Almost surely, 2^2663880965 is an apocalyptic number.

It is an amenable number.

2663880965 is a deficient number, since it is larger than the sum of its proper divisors (602431723).

2663880965 is a wasteful number, since it uses less digits than its factorization.

2663880965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28888.

The product of its (nonzero) digits is 3732480, while the sum is 53.

The square root of 2663880965 is about 51612.7984612344. The cubic root of 2663880965 is about 1386.2395060462.

The spelling of 2663880965 in words is "two billion, six hundred sixty-three million, eight hundred eighty thousand, nine hundred sixty-five".