2666439412 has 72 divisors (see below), whose sum is σ = 5811763776. Its totient is φ = 1048080384.

The previous prime is 2666439397. The next prime is 2666439421. The reversal of 2666439412 is 2149346662.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 769588 + ... + 773044.

Almost surely, 2^2666439412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2666439412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2905881888).

2666439412 is an abundant number, since it is smaller than the sum of its proper divisors (3145324364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2666439412 is a wasteful number, since it uses less digits than its factorization.

2666439412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657 (or 3642 counting only the distinct ones).

The product of its digits is 373248, while the sum is 43.

The square root of 2666439412 is about 51637.5775187024. The cubic root of 2666439412 is about 1386.6831551859.

The spelling of 2666439412 in words is "two billion, six hundred sixty-six million, four hundred thirty-nine thousand, four hundred twelve".