42668668 has 24 divisors (see below), whose sum is σ = 87155712. Its totient is φ = 17896944.

The previous prime is 42668629. The next prime is 42668693. The reversal of 42668668 is 86686624.

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, 14896 + ... + 17527.

It is an arithmetic number, because the mean of its divisors is an integer number (3631488).

Almost surely, 2^42668668 is an apocalyptic number.

It is an amenable number.

42668668 is an abundant number, since it is smaller than the sum of its proper divisors (44487044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42668668 is a wasteful number, since it uses less digits than its factorization.

42668668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32481 (or 32479 counting only the distinct ones).

The product of its digits is 663552, while the sum is 46.

The square root of 42668668 is about 6532.1258407964. The cubic root of 42668668 is about 349.4376493269.

The spelling of 42668668 in words is "forty-two million, six hundred sixty-eight thousand, six hundred sixty-eight".