42812666 has 8 divisors (see below), whose sum is σ = 69158964. Its totient is φ = 19759680.

The previous prime is 42812659. The next prime is 42812669. The reversal of 42812666 is 66621824.

42812666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 41538025 + 1274641 = 6445^2 + 1129^2 .

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

It is not an unprimeable number, because it can be changed into a prime (42812669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823295 + ... + 823346.

Almost surely, 2^42812666 is an apocalyptic number.

42812666 is a deficient number, since it is larger than the sum of its proper divisors (26346298).

42812666 is a wasteful number, since it uses less digits than its factorization.

42812666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646656.

The product of its digits is 27648, while the sum is 35.

The square root of 42812666 is about 6543.1388492069. The cubic root of 42812666 is about 349.8303014079.

The spelling of 42812666 in words is "forty-two million, eight hundred twelve thousand, six hundred sixty-six".