2666720286 has 32 divisors (see below), whose sum is σ = 6023200800. Its totient is φ = 874333440.

The previous prime is 2666720269. The next prime is 2666720299. The reversal of 2666720286 is 6820276662.

It is a super-2 number, since 2×2666720286² = 14222794167527843592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401491 + ... + 408078.

It is an arithmetic number, because the mean of its divisors is an integer number (188225025).

Almost surely, 2^2666720286 is an apocalyptic number.

2666720286 is an abundant number, since it is smaller than the sum of its proper divisors (3356480514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2666720286 is a wasteful number, since it uses less digits than its factorization.

2666720286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809641 (or 809635 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 2666720286 is about 51640.2971137851. The cubic root of 2666720286 is about 1386.7318430313.

The spelling of 2666720286 in words is "two billion, six hundred sixty-six million, seven hundred twenty thousand, two hundred eighty-six".