1161665059 has 16 divisors (see below), whose sum is σ = 1193512320. Its totient is φ = 1130388480.

The previous prime is 1161665051. The next prime is 1161665083. The reversal of 1161665059 is 9505661611.

It is a cyclic number.

It is not a de Polignac number, because 1161665059 - 2³ = 1161665051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161665051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1958667 + ... + 1959259.

It is an arithmetic number, because the mean of its divisors is an integer number (74594520).

Almost surely, 2^1161665059 is an apocalyptic number.

1161665059 is a deficient number, since it is larger than the sum of its proper divisors (31847261).

1161665059 is a wasteful number, since it uses less digits than its factorization.

1161665059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990.

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

The square root of 1161665059 is about 34083.2078742597. The cubic root of 1161665059 is about 1051.2200659763.

The spelling of 1161665059 in words is "one billion, one hundred sixty-one million, six hundred sixty-five thousand, fifty-nine".