4026866891 has 16 divisors (see below), whose sum is σ = 4424271840. Its totient is φ = 3648099840.

The previous prime is 4026866873. The next prime is 4026866911. The reversal of 4026866891 is 1986686204.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 4026866891 - 2²⁶ = 3959758027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4026866191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150845 + ... + 175521.

It is an arithmetic number, because the mean of its divisors is an integer number (276516990).

Almost surely, 2^4026866891 is an apocalyptic number.

4026866891 is a deficient number, since it is larger than the sum of its proper divisors (397404949).

4026866891 is a wasteful number, since it uses less digits than its factorization.

4026866891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25054.

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 4026866891 is about 63457.5991588084. The cubic root of 4026866891 is about 1590.9471686046.

The spelling of 4026866891 in words is "four billion, twenty-six million, eight hundred sixty-six thousand, eight hundred ninety-one".