2661959 has 2 divisors, whose sum is σ = 2661960. Its totient is φ = 2661958.

The previous prime is 2661949. The next prime is 2661961. The reversal of 2661959 is 9591662.

2661959 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2661959 - 2⁴ = 2661943 is a prime.

Together with 2661961, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2661929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330979 + 1330980.

It is an arithmetic number, because the mean of its divisors is an integer number (1330980).

2^2661959 is an apocalyptic number.

2661959 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661959 is an equidigital number, since it uses as much as digits as its factorization.

2661959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 38.

The square root of 2661959 is about 1631.5511024789. The cubic root of 2661959 is about 138.5906039591.

The spelling of 2661959 in words is "two million, six hundred sixty-one thousand, nine hundred fifty-nine".