66835089 has 12 divisors (see below), whose sum is σ = 97443216. Its totient is φ = 44139672.

The previous prime is 66835073. The next prime is 66835091. The reversal of 66835089 is 98053866.

66835089 is a `hidden beast` number, since 66 + 83 + 508 + 9 = 666.

It is not a de Polignac number, because 66835089 - 2⁴ = 66835073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66835009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33739 + ... + 35664.

It is an arithmetic number, because the mean of its divisors is an integer number (8120268).

Almost surely, 2^66835089 is an apocalyptic number.

It is an amenable number.

66835089 is a deficient number, since it is larger than the sum of its proper divisors (30608127).

66835089 is a wasteful number, since it uses less digits than its factorization.

66835089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69516 (or 69513 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 66835089 is about 8175.2730229638. The cubic root of 66835089 is about 405.8213054447.

The spelling of 66835089 in words is "sixty-six million, eight hundred thirty-five thousand, eighty-nine".