2666439413 has 4 divisors (see below), whose sum is σ = 2908843008. Its totient is φ = 2424035820.

The previous prime is 2666439397. The next prime is 2666439421. The reversal of 2666439413 is 3149346662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2666439413 - 2⁴ = 2666439397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666439493) 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, 121201781 + ... + 121201802.

It is an arithmetic number, because the mean of its divisors is an integer number (727210752).

Almost surely, 2^2666439413 is an apocalyptic number.

It is an amenable number.

2666439413 is a deficient number, since it is larger than the sum of its proper divisors (242403595).

2666439413 is a wasteful number, since it uses less digits than its factorization.

2666439413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242403594.

The product of its digits is 559872, while the sum is 44.

The square root of 2666439413 is about 51637.5775283853. The cubic root of 2666439413 is about 1386.6831553592.

The spelling of 2666439413 in words is "two billion, six hundred sixty-six million, four hundred thirty-nine thousand, four hundred thirteen".