42066557 has 4 divisors (see below), whose sum is σ = 45302460. Its totient is φ = 38830656.

The previous prime is 42066527. The next prime is 42066569. The reversal of 42066557 is 75566024.

42066557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22477081 + 19589476 = 4741^2 + 4426^2 .

It is a cyclic number.

It is not a de Polignac number, because 42066557 - 2¹⁰ = 42065533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42066527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1617932 + ... + 1617957.

It is an arithmetic number, because the mean of its divisors is an integer number (11325615).

Almost surely, 2^42066557 is an apocalyptic number.

It is an amenable number.

42066557 is a deficient number, since it is larger than the sum of its proper divisors (3235903).

42066557 is a wasteful number, since it uses less digits than its factorization.

42066557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3235902.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 42066557 is about 6485.8736497098. The cubic root of 42066557 is about 347.7861817940.

The spelling of 42066557 in words is "forty-two million, sixty-six thousand, five hundred fifty-seven".