1666115059 has 8 divisors (see below), whose sum is σ = 1904382560. Its totient is φ = 1427910336.

The previous prime is 1666115029. The next prime is 1666115117. The reversal of 1666115059 is 9505116661.

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

It is a cyclic number.

It is not a de Polignac number, because 1666115059 - 2⁹ = 1666114547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666115029) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 80527 + ... + 99079.

It is an arithmetic number, because the mean of its divisors is an integer number (238047820).

Almost surely, 2^1666115059 is an apocalyptic number.

1666115059 is a deficient number, since it is larger than the sum of its proper divisors (238267501).

1666115059 is a wasteful number, since it uses less digits than its factorization.

1666115059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31389.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 1666115059 is about 40818.0727007045. The cubic root of 1666115059 is about 1185.5002864228.

The spelling of 1666115059 in words is "one billion, six hundred sixty-six million, one hundred fifteen thousand, fifty-nine".