427705566 has 8 divisors (see below), whose sum is σ = 855411144. Its totient is φ = 142568520.

The previous prime is 427705559. The next prime is 427705583. The reversal of 427705566 is 665507724.

It is a sphenic number, since it is the product of 3 distinct primes.

427705566 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35642125 + ... + 35642136.

It is an arithmetic number, because the mean of its divisors is an integer number (106926393).

Almost surely, 2^427705566 is an apocalyptic number.

427705566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

427705566 is a wasteful number, since it uses less digits than its factorization.

427705566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71284266.

The product of its (nonzero) digits is 352800, while the sum is 42.

The square root of 427705566 is about 20681.0436390430. The cubic root of 427705566 is about 753.4393539057.

The spelling of 427705566 in words is "four hundred twenty-seven million, seven hundred five thousand, five hundred sixty-six".