2015566266 has 16 divisors (see below), whose sum is σ = 4607008704. Its totient is φ = 575876064.

The previous prime is 2015566261. The next prime is 2015566279. The reversal of 2015566266 is 6626655102.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2015566261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23994795 + ... + 23994878.

It is an arithmetic number, because the mean of its divisors is an integer number (287938044).

Almost surely, 2^2015566266 is an apocalyptic number.

2015566266 is an abundant number, since it is smaller than the sum of its proper divisors (2591442438).

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

2015566266 is a wasteful number, since it uses less digits than its factorization.

2015566266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47989685.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 2015566266 is about 44895.0583694910. The cubic root of 2015566266 is about 1263.1813171368.

The spelling of 2015566266 in words is "two billion, fifteen million, five hundred sixty-six thousand, two hundred sixty-six".