2666442999 has 24 divisors (see below), whose sum is σ = 4013482480. Its totient is φ = 1572341760.

The previous prime is 2666442971. The next prime is 2666443009. The reversal of 2666442999 is 9992446662.

It is a happy number.

It is not a de Polignac number, because 2666442999 - 2⁵ = 2666442967 is a prime.

It is a super-2 number, since 2×2666442999² = 14219836533832228002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666442929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85834 + ... + 112695.

Almost surely, 2^2666442999 is an apocalyptic number.

2666442999 is a deficient number, since it is larger than the sum of its proper divisors (1347039481).

2666442999 is a wasteful number, since it uses less digits than its factorization.

2666442999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198591 (or 198580 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 57.

The square root of 2666442999 is about 51637.6122511489. The cubic root of 2666442999 is about 1386.6837769927.

The spelling of 2666442999 in words is "two billion, six hundred sixty-six million, four hundred forty-two thousand, nine hundred ninety-nine".