6641566651466 has 8 divisors (see below), whose sum is σ = 9962620077600. Its totient is φ = 3320693292268.

The previous prime is 6641566651451. The next prime is 6641566651487.

6641566651466 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×6641566651466² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6641566651399 and 6641566651408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44924486 + ... + 45072081.

It is an arithmetic number, because the mean of its divisors is an integer number (1245327509700).

Almost surely, 2^{6641566651466} is an apocalyptic number.

6641566651466 is a deficient number, since it is larger than the sum of its proper divisors (3321053426134).

6641566651466 is a wasteful number, since it uses less digits than its factorization.

6641566651466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90033468.

The product of its digits is 111974400, while the sum is 62.

The spelling of 6641566651466 in words is "six trillion, six hundred forty-one billion, five hundred sixty-six million, six hundred fifty-one thousand, four hundred sixty-six".