2668787965 has 4 divisors (see below), whose sum is σ = 3202545564. Its totient is φ = 2135030368.

The previous prime is 2668787951. The next prime is 2668787971. The reversal of 2668787965 is 5697878662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1070467524 + 1598320441 = 32718^2 + 39979^2 .

It is a cyclic number.

It is not a de Polignac number, because 2668787965 - 2¹⁵ = 2668755197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2668787897 and 2668787906.

It is a congruent number.

It is an unprimeable number.

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, 266878792 + ... + 266878801.

It is an arithmetic number, because the mean of its divisors is an integer number (800636391).

Almost surely, 2^2668787965 is an apocalyptic number.

It is an amenable number.

2668787965 is a deficient number, since it is larger than the sum of its proper divisors (533757599).

2668787965 is an equidigital number, since it uses as much as digits as its factorization.

2668787965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533757598.

The product of its digits is 60963840, while the sum is 64.

The square root of 2668787965 is about 51660.3132491471. The cubic root of 2668787965 is about 1387.0901577713.

The spelling of 2668787965 in words is "two billion, six hundred sixty-eight million, seven hundred eighty-seven thousand, nine hundred sixty-five".