66288085 has 8 divisors (see below), whose sum is σ = 80666496. Its totient is φ = 52283280.

The previous prime is 66288073. The next prime is 66288109. The reversal of 66288085 is 58088266.

It is a happy number.

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

It is not a de Polignac number, because 66288085 - 2¹¹ = 66286037 is a prime.

It is a super-2 number, since 2×66288085² = 8788220425934450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93009 + ... + 93718.

It is an arithmetic number, because the mean of its divisors is an integer number (10083312).

Almost surely, 2^66288085 is an apocalyptic number.

It is an amenable number.

66288085 is a deficient number, since it is larger than the sum of its proper divisors (14378411).

66288085 is a wasteful number, since it uses less digits than its factorization.

66288085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186803.

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 66288085 is about 8141.7495048669. The cubic root of 66288085 is about 404.7111388377.

The spelling of 66288085 in words is "sixty-six million, two hundred eighty-eight thousand, eighty-five".