66500085 has 8 divisors (see below), whose sum is σ = 106400160. Its totient is φ = 35466704.

The previous prime is 66500081. The next prime is 66500099. The reversal of 66500085 is 58000566.

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 66500085 - 2² = 66500081 is a prime.

It is a super-2 number, since 2×66500085² = 8844522610014450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66500081) 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, 2216655 + ... + 2216684.

It is an arithmetic number, because the mean of its divisors is an integer number (13300020).

Almost surely, 2^66500085 is an apocalyptic number.

It is an amenable number.

66500085 is a deficient number, since it is larger than the sum of its proper divisors (39900075).

66500085 is a wasteful number, since it uses less digits than its factorization.

66500085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433347.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 66500085 is about 8154.7584268328. The cubic root of 66500085 is about 405.1421235690.

The spelling of 66500085 in words is "sixty-six million, five hundred thousand, eighty-five".