1155666583 has 8 divisors (see below), whose sum is σ = 1216822320. Its totient is φ = 1094544000.

The previous prime is 1155666563. The next prime is 1155666607. The reversal of 1155666583 is 3856665511.

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 1155666583 - 2²⁵ = 1122112151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155666563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98991 + ... + 110047.

It is an arithmetic number, because the mean of its divisors is an integer number (152102790).

Almost surely, 2^1155666583 is an apocalyptic number.

1155666583 is a deficient number, since it is larger than the sum of its proper divisors (61155737).

1155666583 is a wasteful number, since it uses less digits than its factorization.

1155666583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16577.

The product of its digits is 648000, while the sum is 46.

The square root of 1155666583 is about 33995.0964552242. The cubic root of 1155666583 is about 1049.4075517987.

The spelling of 1155666583 in words is "one billion, one hundred fifty-five million, six hundred sixty-six thousand, five hundred eighty-three".