66786285 has 32 divisors (see below), whose sum is σ = 113847552. Its totient is φ = 33315840.

The previous prime is 66786271. The next prime is 66786329. The reversal of 66786285 is 58268766.

It is not a de Polignac number, because 66786285 - 2⁷ = 66786157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45432 + ... + 46878.

It is an arithmetic number, because the mean of its divisors is an integer number (3557736).

Almost surely, 2^66786285 is an apocalyptic number.

It is an amenable number.

66786285 is a deficient number, since it is larger than the sum of its proper divisors (47061267).

66786285 is a wasteful number, since it uses less digits than its factorization.

66786285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653.

The product of its digits is 967680, while the sum is 48.

The square root of 66786285 is about 8172.2876234259. The cubic root of 66786285 is about 405.7225024254.

The spelling of 66786285 in words is "sixty-six million, seven hundred eighty-six thousand, two hundred eighty-five".