66655285 has 8 divisors (see below), whose sum is σ = 81180576. Its totient is φ = 52528080.

The previous prime is 66655271. The next prime is 66655319. The reversal of 66655285 is 58255666.

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

It is not a de Polignac number, because 66655285 - 2⁷ = 66655157 is a prime.

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, 99151 + ... + 99820.

It is an arithmetic number, because the mean of its divisors is an integer number (10147572).

Almost surely, 2^66655285 is an apocalyptic number.

It is an amenable number.

66655285 is a deficient number, since it is larger than the sum of its proper divisors (14525291).

66655285 is a wasteful number, since it uses less digits than its factorization.

66655285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199043.

The product of its digits is 432000, while the sum is 43.

The square root of 66655285 is about 8164.2687976328. The cubic root of 66655285 is about 405.4570565264.

The spelling of 66655285 in words is "sixty-six million, six hundred fifty-five thousand, two hundred eighty-five".