42225666065566 has 4 divisors (see below), whose sum is σ = 63338499098352. Its totient is φ = 21112833032782.

The previous prime is 42225666065537. The next prime is 42225666065579. The reversal of 42225666065566 is 66556066652224.

It is a happy number.

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, 10556416516390 + ... + 10556416516393.

It is an arithmetic number, because the mean of its divisors is an integer number (15834624774588).

Almost surely, 2^{42225666065566} is an apocalyptic number.

42225666065566 is a deficient number, since it is larger than the sum of its proper divisors (21112833032786).

42225666065566 is a wasteful number, since it uses less digits than its factorization.

42225666065566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21112833032785.

The product of its (nonzero) digits is 186624000, while the sum is 61.

The spelling of 42225666065566 in words is "forty-two trillion, two hundred twenty-five billion, six hundred sixty-six million, sixty-five thousand, five hundred sixty-six".