66844089 has 32 divisors (see below), whose sum is σ = 109549440. Its totient is φ = 40015296.

The previous prime is 66844069. The next prime is 66844093. The reversal of 66844089 is 98044866.

It is a happy number.

It is not a de Polignac number, because 66844089 - 2¹³ = 66835897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66844069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10414 + ... + 15560.

It is an arithmetic number, because the mean of its divisors is an integer number (3423420).

Almost surely, 2^66844089 is an apocalyptic number.

It is an amenable number.

66844089 is a deficient number, since it is larger than the sum of its proper divisors (42705351).

66844089 is a wasteful number, since it uses less digits than its factorization.

66844089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5206 (or 5200 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 66844089 is about 8175.8234447669. The cubic root of 66844089 is about 405.8395205663.

The spelling of 66844089 in words is "sixty-six million, eight hundred forty-four thousand, eighty-nine".