41644021666 has 16 divisors (see below), whose sum is σ = 70811697600. Its totient is φ = 18208721808.

The previous prime is 41644021649. The next prime is 41644021717. The reversal of 41644021666 is 66612044614.

41644021666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42149326 + ... + 42150313.

It is an arithmetic number, because the mean of its divisors is an integer number (4425731100).

Almost surely, 2^41644021666 is an apocalyptic number.

41644021666 is a deficient number, since it is larger than the sum of its proper divisors (29167675934).

41644021666 is a wasteful number, since it uses less digits than its factorization.

41644021666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84299673.

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 41644021666 in words is "forty-one billion, six hundred forty-four million, twenty-one thousand, six hundred sixty-six".