6441661446 has 128 divisors (see below), whose sum is σ = 14935145472. Its totient is φ = 1834560000.

The previous prime is 6441661417. The next prime is 6441661459.

6441661446 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6441661398 and 6441661407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9188896 + ... + 9189596.

It is an arithmetic number, because the mean of its divisors is an integer number (116680824).

Almost surely, 2^6441661446 is an apocalyptic number.

6441661446 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6441661446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7467572736).

6441661446 is an abundant number, since it is smaller than the sum of its proper divisors (8493484026).

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

6441661446 is a wasteful number, since it uses less digits than its factorization.

6441661446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878.

The product of its digits is 331776, while the sum is 42.

The square root of 6441661446 is about 80259.9616620890. The cubic root of 6441661446 is about 1860.6554754194.

The spelling of 6441661446 in words is "six billion, four hundred forty-one million, six hundred sixty-one thousand, four hundred forty-six".