6444444066 has 16 divisors (see below), whose sum is σ = 12889839744. Its totient is φ = 2147989424.

The previous prime is 6444443989. The next prime is 6444444089. The reversal of 6444444066 is 6604444446.

It is a super-2 number, since 2×6444444066² = 83061718639605224712, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73015 + ... + 134981.

It is an arithmetic number, because the mean of its divisors is an integer number (805614984).

Almost surely, 2^6444444066 is an apocalyptic number.

6444444066 is an abundant number, since it is smaller than the sum of its proper divisors (6445395678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6444444066 is a wasteful number, since it uses less digits than its factorization.

6444444066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79305.

The product of its (nonzero) digits is 884736, while the sum is 42.

The square root of 6444444066 is about 80277.2948348411. The cubic root of 6444444066 is about 1860.9233541258.

The spelling of 6444444066 in words is "six billion, four hundred forty-four million, four hundred forty-four thousand, sixty-six".