2666409239 has 16 divisors (see below), whose sum is σ = 2909934720. Its totient is φ = 2428589280.

The previous prime is 2666409223. The next prime is 2666409241. The reversal of 2666409239 is 9329046662.

It is not a de Polignac number, because 2666409239 - 2⁴ = 2666409223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2666409193 and 2666409202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666409139) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 300464 + ... + 309210.

It is an arithmetic number, because the mean of its divisors is an integer number (181870920).

Almost surely, 2^2666409239 is an apocalyptic number.

2666409239 is a deficient number, since it is larger than the sum of its proper divisors (243525481).

2666409239 is a wasteful number, since it uses less digits than its factorization.

2666409239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9070.

The product of its (nonzero) digits is 839808, while the sum is 47.

The square root of 2666409239 is about 51637.2853566103. The cubic root of 2666409239 is about 1386.6779246716.

The spelling of 2666409239 in words is "two billion, six hundred sixty-six million, four hundred nine thousand, two hundred thirty-nine".