442006667 has 4 divisors (see below), whose sum is σ = 442306200. Its totient is φ = 441707136.

The previous prime is 442006657. The next prime is 442006693. The reversal of 442006667 is 766600244.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 442006667 - 2¹⁶ = 441941131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442006657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147542 + ... + 150507.

It is an arithmetic number, because the mean of its divisors is an integer number (110576550).

Almost surely, 2^442006667 is an apocalyptic number.

442006667 is a deficient number, since it is larger than the sum of its proper divisors (299533).

442006667 is a wasteful number, since it uses less digits than its factorization.

442006667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299532.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 442006667 is about 21023.9545994563. The cubic root of 442006667 is about 761.7449902511.

The spelling of 442006667 in words is "four hundred forty-two million, six thousand, six hundred sixty-seven".