442601066 has 4 divisors (see below), whose sum is σ = 663901602. Its totient is φ = 221300532.

The previous prime is 442601063. The next prime is 442601077. The reversal of 442601066 is 660106244.

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

It can be written as a sum of positive squares in only one way, i.e., 414733225 + 27867841 = 20365^2 + 5279^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (442601063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110650265 + ... + 110650268.

Almost surely, 2^442601066 is an apocalyptic number.

442601066 is a deficient number, since it is larger than the sum of its proper divisors (221300536).

442601066 is a wasteful number, since it uses less digits than its factorization.

442601066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221300535.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 442601066 is about 21038.0860821511. The cubic root of 442601066 is about 762.0862955475.

The spelling of 442601066 in words is "four hundred forty-two million, six hundred one thousand, sixty-six".