2666899 has 4 divisors (see below), whose sum is σ = 2752960. Its totient is φ = 2580840.

The previous prime is 2666891. The next prime is 2666929. The reversal of 2666899 is 9986662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2666899 - 2³ = 2666891 is a prime.

It is a super-2 number, since 2×2666899² = 14224700552402, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2666891) 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, 42984 + ... + 43045.

It is an arithmetic number, because the mean of its divisors is an integer number (688240).

2^2666899 is an apocalyptic number.

2666899 is a deficient number, since it is larger than the sum of its proper divisors (86061).

2666899 is an equidigital number, since it uses as much as digits as its factorization.

2666899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86060.

The product of its digits is 279936, while the sum is 46.

The square root of 2666899 is about 1633.0642975707. The cubic root of 2666899 is about 138.6762820266.

The spelling of 2666899 in words is "two million, six hundred sixty-six thousand, eight hundred ninety-nine".