42671668 has 12 divisors (see below), whose sum is σ = 80419780. Its totient is φ = 19694592.

The previous prime is 42671653. The next prime is 42671669. The reversal of 42671668 is 86617624.

It can be written as a sum of positive squares in 2 ways, for example, as 24880144 + 17791524 = 4988^2 + 4218^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42671668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42671669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410253 + ... + 410356.

Almost surely, 2^42671668 is an apocalyptic number.

It is an amenable number.

42671668 is a deficient number, since it is larger than the sum of its proper divisors (37748112).

42671668 is a wasteful number, since it uses less digits than its factorization.

42671668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820626 (or 820624 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 42671668 is about 6532.3554710380. The cubic root of 42671668 is about 349.4458386958.

The spelling of 42671668 in words is "forty-two million, six hundred seventy-one thousand, six hundred sixty-eight".