66656285 has 8 divisors (see below), whose sum is σ = 80033280. Its totient is φ = 53294544.

The previous prime is 66656279. The next prime is 66656299. The reversal of 66656285 is 58265666.

It is a happy number.

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 66656285 - 2¹⁰ = 66655261 is a prime.

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, 11144 + ... + 16046.

It is an arithmetic number, because the mean of its divisors is an integer number (10004160).

Almost surely, 2^66656285 is an apocalyptic number.

It is an amenable number.

66656285 is a deficient number, since it is larger than the sum of its proper divisors (13376995).

66656285 is a wasteful number, since it uses less digits than its factorization.

66656285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7627.

The product of its digits is 518400, while the sum is 44.

The square root of 66656285 is about 8164.3300398747. The cubic root of 66656285 is about 405.4590841477.

The spelling of 66656285 in words is "sixty-six million, six hundred fifty-six thousand, two hundred eighty-five".