442442066 has 12 divisors (see below), whose sum is σ = 729481326. Its totient is φ = 201109920.

The previous prime is 442442059. The next prime is 442442083. The reversal of 442442066 is 660244244.

It can be written as a sum of positive squares in only one way, i.e., 325044841 + 117397225 = 18029^2 + 10835^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 913895 + ... + 914378.

Almost surely, 2^442442066 is an apocalyptic number.

442442066 is a deficient number, since it is larger than the sum of its proper divisors (287039260).

442442066 is a wasteful number, since it uses less digits than its factorization.

442442066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828297 (or 1828286 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

The square root of 442442066 is about 21034.3068818537. The cubic root of 442442066 is about 761.9950273280.

The spelling of 442442066 in words is "four hundred forty-two million, four hundred forty-two thousand, sixty-six".