42605566 has 4 divisors (see below), whose sum is σ = 63908352. Its totient is φ = 21302782.

The previous prime is 42605551. The next prime is 42605573. The reversal of 42605566 is 66550624.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651390 + ... + 10651393.

It is an arithmetic number, because the mean of its divisors is an integer number (15977088).

Almost surely, 2^42605566 is an apocalyptic number.

42605566 is a deficient number, since it is larger than the sum of its proper divisors (21302786).

42605566 is a wasteful number, since it uses less digits than its factorization.

42605566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21302785.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 42605566 is about 6527.2939262760. The cubic root of 42605566 is about 349.2653051188.

The spelling of 42605566 in words is "forty-two million, six hundred five thousand, five hundred sixty-six".