660089089 has 16 divisors (see below), whose sum is σ = 759732480. Its totient is φ = 567196560.

The previous prime is 660089069. The next prime is 660089093. The reversal of 660089089 is 980980066.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 660089089 - 2⁵ = 660089057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660089069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94222 + ... + 100984.

It is an arithmetic number, because the mean of its divisors is an integer number (47483280).

Almost surely, 2^660089089 is an apocalyptic number.

It is an amenable number.

660089089 is a deficient number, since it is larger than the sum of its proper divisors (99643391).

660089089 is a wasteful number, since it uses less digits than its factorization.

660089089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7260.

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

The square root of 660089089 is about 25692.1989911335. The cubic root of 660089089 is about 870.6979421625.

The spelling of 660089089 in words is "six hundred sixty million, eighty-nine thousand, eighty-nine".