2660839 has 2 divisors, whose sum is σ = 2660840. Its totient is φ = 2660838.

The previous prime is 2660831. The next prime is 2660849. The reversal of 2660839 is 9380662.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2660839 - 2³ = 2660831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2660831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330419 + 1330420.

It is an arithmetic number, because the mean of its divisors is an integer number (1330420).

2^2660839 is an apocalyptic number.

2660839 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660839 is an equidigital number, since it uses as much as digits as its factorization.

2660839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 2660839 is about 1631.2078347041. The cubic root of 2660839 is about 138.5711642343.

The spelling of 2660839 in words is "two million, six hundred sixty thousand, eight hundred thirty-nine".