1666560115 has 16 divisors (see below), whose sum is σ = 2189408256. Its totient is φ = 1207749600.

The previous prime is 1666560109. The next prime is 1666560121. The reversal of 1666560115 is 5110656661.

It is an interprime number because it is at equal distance from previous prime (1666560109) and next prime (1666560121).

It is not a de Polignac number, because 1666560115 - 2⁹ = 1666559603 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37971 + ... + 69100.

It is an arithmetic number, because the mean of its divisors is an integer number (136838016).

Almost surely, 2^1666560115 is an apocalyptic number.

1666560115 is a deficient number, since it is larger than the sum of its proper divisors (522848141).

1666560115 is a wasteful number, since it uses less digits than its factorization.

1666560115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107370.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1666560115 is about 40823.5240394555. The cubic root of 1666560115 is about 1185.6058347643.

The spelling of 1666560115 in words is "one billion, six hundred sixty-six million, five hundred sixty thousand, one hundred fifteen".