42665526 has 24 divisors (see below), whose sum is σ = 97308120. Its totient is φ = 13473216.

The previous prime is 42665489. The next prime is 42665527. The reversal of 42665526 is 62556624.

42665526 is a `hidden beast` number, since 42 + 66 + 552 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42665527) by changing a digit.

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, 62035 + ... + 62718.

It is an arithmetic number, because the mean of its divisors is an integer number (4054505).

Almost surely, 2^42665526 is an apocalyptic number.

42665526 is an abundant number, since it is smaller than the sum of its proper divisors (54642594).

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

42665526 is a wasteful number, since it uses less digits than its factorization.

42665526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124780 (or 124777 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 42665526 is about 6531.8853327351. The cubic root of 42665526 is about 349.4290719164.

The spelling of 42665526 in words is "forty-two million, six hundred sixty-five thousand, five hundred twenty-six".