6442066 has 4 divisors (see below), whose sum is σ = 9663102. Its totient is φ = 3221032.

The previous prime is 6442063. The next prime is 6442081. The reversal of 6442066 is 6602446.

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., 6395841 + 46225 = 2529^2 + 215^2 .

It is not an unprimeable number, because it can be changed into a prime (6442063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610515 + ... + 1610518.

Almost surely, 2^6442066 is an apocalyptic number.

6442066 is a deficient number, since it is larger than the sum of its proper divisors (3221036).

6442066 is a wasteful number, since it uses less digits than its factorization.

6442066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221035.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 6442066 is about 2538.1225344731. The cubic root of 6442066 is about 186.0694426026.

The spelling of 6442066 in words is "six million, four hundred forty-two thousand, sixty-six".