42636566 has 24 divisors (see below), whose sum is σ = 74675016. Its totient is φ = 18204480.

The previous prime is 42636533. The next prime is 42636571. The reversal of 42636566 is 66563624.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32381 + ... + 33671.

It is an arithmetic number, because the mean of its divisors is an integer number (3111459).

Almost surely, 2^42636566 is an apocalyptic number.

42636566 is a deficient number, since it is larger than the sum of its proper divisors (32038450).

42636566 is a wasteful number, since it uses less digits than its factorization.

42636566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644 (or 1637 counting only the distinct ones).

The product of its digits is 155520, while the sum is 38.

The square root of 42636566 is about 6529.6681385810. The cubic root of 42636566 is about 349.3499935806.

The spelling of 42636566 in words is "forty-two million, six hundred thirty-six thousand, five hundred sixty-six".