2666440004 has 72 divisors (see below), whose sum is σ = 5085393600. Its totient is φ = 1222746624.

The previous prime is 2666439977. The next prime is 2666440013. The reversal of 2666440004 is 4000446662.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13399097 + ... + 13399295.

Almost surely, 2^2666440004 is an apocalyptic number.

It is an amenable number.

2666440004 is a deficient number, since it is larger than the sum of its proper divisors (2418953596).

2666440004 is a wasteful number, since it uses less digits than its factorization.

2666440004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 2666440004 is about 51637.5832509617. The cubic root of 2666440004 is about 1386.6832578092.

Adding to 2666440004 its reverse (4000446662), we get a palindrome (6666886666).

The spelling of 2666440004 in words is "two billion, six hundred sixty-six million, four hundred forty thousand, four".