2015861066 has 8 divisors (see below), whose sum is σ = 3026576640. Its totient is φ = 1007002188.

The previous prime is 2015861041. The next prime is 2015861077. The reversal of 2015861066 is 6601685102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461456 + ... + 465803.

It is an arithmetic number, because the mean of its divisors is an integer number (378322080).

Almost surely, 2^2015861066 is an apocalyptic number.

2015861066 is a deficient number, since it is larger than the sum of its proper divisors (1010715574).

2015861066 is a wasteful number, since it uses less digits than its factorization.

2015861066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928348.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 2015861066 is about 44898.3414615729. The cubic root of 2015861066 is about 1263.2428991191.

The spelling of 2015861066 in words is "two billion, fifteen million, eight hundred sixty-one thousand, sixty-six".