2665939 has 2 divisors, whose sum is σ = 2665940. Its totient is φ = 2665938.

The previous prime is 2665933. The next prime is 2665967. The reversal of 2665939 is 9395662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2665939 - 2³ = 2665931 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2665931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332969 + 1332970.

It is an arithmetic number, because the mean of its divisors is an integer number (1332970).

2^2665939 is an apocalyptic number.

2665939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665939 is an equidigital number, since it uses as much as digits as its factorization.

2665939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 40.

The square root of 2665939 is about 1632.7703451496. The cubic root of 2665939 is about 138.6596403255.

The spelling of 2665939 in words is "two million, six hundred sixty-five thousand, nine hundred thirty-nine".