666012285 has 24 divisors (see below), whose sum is σ = 1155023064. Its totient is φ = 355021440.

The previous prime is 666012283. The next prime is 666012287. The reversal of 666012285 is 582210666.

It is an interprime number because it is at equal distance from previous prime (666012283) and next prime (666012287).

It can be written as a sum of positive squares in 4 ways, for example, as 257891481 + 408120804 = 16059^2 + 20202^2 .

It is not a de Polignac number, because 666012285 - 2¹ = 666012283 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666012283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159079 + ... + 163211.

It is an arithmetic number, because the mean of its divisors is an integer number (48125961).

Almost surely, 2^666012285 is an apocalyptic number.

It is an amenable number.

666012285 is a deficient number, since it is larger than the sum of its proper divisors (489010779).

666012285 is a wasteful number, since it uses less digits than its factorization.

666012285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7725 (or 7722 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 666012285 is about 25807.2138170706. The cubic root of 666012285 is about 873.2945436449.

It can be divided in two parts, 66601 and 2285, that added together give a palindrome (68886).

The spelling of 666012285 in words is "six hundred sixty-six million, twelve thousand, two hundred eighty-five".