66665085 has 8 divisors (see below), whose sum is σ = 106664160. Its totient is φ = 35554704.

The previous prime is 66665077. The next prime is 66665087. The reversal of 66665085 is 58056666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66665085 - 2³ = 66665077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66665087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2222155 + ... + 2222184.

It is an arithmetic number, because the mean of its divisors is an integer number (13333020).

Almost surely, 2^66665085 is an apocalyptic number.

It is an amenable number.

66665085 is a deficient number, since it is larger than the sum of its proper divisors (39999075).

66665085 is a wasteful number, since it uses less digits than its factorization.

66665085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4444347.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 66665085 is about 8164.8689517959. The cubic root of 66665085 is about 405.4769263408.

The spelling of 66665085 in words is "sixty-six million, six hundred sixty-five thousand, eighty-five".