2668820339 has 4 divisors (see below), whose sum is σ = 2733913560. Its totient is φ = 2603727120.

The previous prime is 2668820309. The next prime is 2668820347. The reversal of 2668820339 is 9330288662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9330288662 = 2 ⋅4665144331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2668820339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2668820293 and 2668820302.

It is not an unprimeable number, because it can be changed into a prime (2668820309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32546549 + ... + 32546630.

It is an arithmetic number, because the mean of its divisors is an integer number (683478390).

Almost surely, 2^2668820339 is an apocalyptic number.

2668820339 is a deficient number, since it is larger than the sum of its proper divisors (65093221).

2668820339 is an equidigital number, since it uses as much as digits as its factorization.

2668820339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65093220.

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 2668820339 is about 51660.6265835017. The cubic root of 2668820339 is about 1387.0957664941.

The spelling of 2668820339 in words is "two billion, six hundred sixty-eight million, eight hundred twenty thousand, three hundred thirty-nine".