6641221466 has 8 divisors (see below), whose sum is σ = 10867453344. Its totient is φ = 3018737020.

The previous prime is 6641221409. The next prime is 6641221471.

6641221466 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150936830 + ... + 150936873.

It is an arithmetic number, because the mean of its divisors is an integer number (1358431668).

Almost surely, 2^6641221466 is an apocalyptic number.

6641221466 is a deficient number, since it is larger than the sum of its proper divisors (4226231878).

6641221466 is a wasteful number, since it uses less digits than its factorization.

6641221466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301873716.

The product of its digits is 82944, while the sum is 38.

The square root of 6641221466 is about 81493.6897311688. The cubic root of 6641221466 is about 1879.6745198193.

It can be divided in two parts, 66412 and 21466, that added together give a palindrome (87878).

The spelling of 6641221466 in words is "six billion, six hundred forty-one million, two hundred twenty-one thousand, four hundred sixty-six".