2115666075 has 24 divisors (see below), whose sum is σ = 3502061568. Its totient is φ = 1127013280.

The previous prime is 2115666067. The next prime is 2115666079. The reversal of 2115666075 is 5706665112.

It is not a de Polignac number, because 2115666075 - 2³ = 2115666067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2115666079) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48382 + ... + 81068.

It is an arithmetic number, because the mean of its divisors is an integer number (145919232).

Almost surely, 2^2115666075 is an apocalyptic number.

2115666075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2115666075 is a deficient number, since it is larger than the sum of its proper divisors (1386395493).

2115666075 is a wasteful number, since it uses less digits than its factorization.

2115666075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33563 (or 33558 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 2115666075 is about 45996.3702372263. The cubic root of 2115666075 is about 1283.7556678606.

The spelling of 2115666075 in words is "two billion, one hundred fifteen million, six hundred sixty-six thousand, seventy-five".