2666805085 has 32 divisors (see below), whose sum is σ = 3742060032. Its totient is φ = 1786767360.

The previous prime is 2666805077. The next prime is 2666805139. The reversal of 2666805085 is 5805086662.

It is not a de Polignac number, because 2666805085 - 2³ = 2666805077 is a prime.

It is a super-2 number, since 2×2666805085² = 14223698722763714450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276057 + ... + 285553.

It is an arithmetic number, because the mean of its divisors is an integer number (116939376).

Almost surely, 2^2666805085 is an apocalyptic number.

It is an amenable number.

2666805085 is a deficient number, since it is larger than the sum of its proper divisors (1075254947).

2666805085 is a wasteful number, since it uses less digits than its factorization.

2666805085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9693.

The product of its (nonzero) digits is 691200, while the sum is 46.

The square root of 2666805085 is about 51641.1181617904. The cubic root of 2666805085 is about 1386.7465417641.

The spelling of 2666805085 in words is "two billion, six hundred sixty-six million, eight hundred five thousand, eighty-five".