42066668 has 12 divisors (see below), whose sum is σ = 84133392. Its totient is φ = 18028560.

The previous prime is 42066643. The next prime is 42066671. The reversal of 42066668 is 86666024.

42066668 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751163 + ... + 751218.

It is an arithmetic number, because the mean of its divisors is an integer number (7011116).

Almost surely, 2^42066668 is an apocalyptic number.

It is an amenable number.

42066668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

42066668 is a wasteful number, since it uses less digits than its factorization.

42066668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502392 (or 1502390 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 42066668 is about 6485.8822067626. The cubic root of 42066668 is about 347.7864876921.

The spelling of 42066668 in words is "forty-two million, sixty-six thousand, six hundred sixty-eight".