2666840408 has 16 divisors (see below), whose sum is σ = 5122285560. Its totient is φ = 1300897600.

The previous prime is 2666840387. The next prime is 2666840413. The reversal of 2666840408 is 8040486662.

2666840408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2666840408² = 14224075523483212928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4064978 + ... + 4065633.

Almost surely, 2^2666840408 is an apocalyptic number.

It is an amenable number.

2666840408 is a deficient number, since it is larger than the sum of its proper divisors (2455445152).

2666840408 is a wasteful number, since it uses less digits than its factorization.

2666840408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8130658 (or 8130654 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 2666840408 is about 51641.4601652587. The cubic root of 2666840408 is about 1386.7526644253.

It can be divided in two parts, 26668 and 40408, that added together give a palindrome (67076).

The spelling of 2666840408 in words is "two billion, six hundred sixty-six million, eight hundred forty thousand, four hundred eight".