42566664 has 64 divisors (see below), whose sum is σ = 125827200. Its totient is φ = 11741184.

The previous prime is 42566659. The next prime is 42566681. The reversal of 42566664 is 46666524.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 504 + ... + 9240.

It is an arithmetic number, because the mean of its divisors is an integer number (1966050).

Almost surely, 2^42566664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42566664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62913600).

42566664 is an abundant number, since it is smaller than the sum of its proper divisors (83260536).

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

42566664 is a wasteful number, since it uses less digits than its factorization.

42566664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8782 (or 8778 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 42566664 is about 6524.3132971984. The cubic root of 42566664 is about 349.1589711534.

The spelling of 42566664 in words is "forty-two million, five hundred sixty-six thousand, six hundred sixty-four".