866090089 has 8 divisors (see below), whose sum is σ = 875427840. Its totient is φ = 856791936.

The previous prime is 866089949. The next prime is 866090107. The reversal of 866090089 is 980090668.

It is a happy number.

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 866090089 - 2⁹ = 866089577 is a prime.

It is a super-3 number, since 3×866090089³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866090389) 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, 35172 + ... + 54490.

It is an arithmetic number, because the mean of its divisors is an integer number (109428480).

Almost surely, 2^866090089 is an apocalyptic number.

It is an amenable number.

866090089 is a deficient number, since it is larger than the sum of its proper divisors (9337751).

866090089 is a wasteful number, since it uses less digits than its factorization.

866090089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19799.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 866090089 is about 29429.4085737379. The cubic root of 866090089 is about 953.2080241701.

The spelling of 866090089 in words is "eight hundred sixty-six million, ninety thousand, eighty-nine".