21746533341666 has 32 divisors (see below), whose sum is σ = 50218798654080. Its totient is φ = 6149240649216.

The previous prime is 21746533341629. The next prime is 21746533341683. The reversal of 21746533341666 is 66614333564712.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2668937181 + ... + 2668945328.

It is an arithmetic number, because the mean of its divisors is an integer number (1569337457940).

Almost surely, 2^{21746533341666} is an apocalyptic number.

21746533341666 is an abundant number, since it is smaller than the sum of its proper divisors (28472265312414).

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

21746533341666 is a wasteful number, since it uses less digits than its factorization.

21746533341666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5337882618.

The product of its digits is 39191040, while the sum is 57.

The spelling of 21746533341666 in words is "twenty-one trillion, seven hundred forty-six billion, five hundred thirty-three million, three hundred forty-one thousand, six hundred sixty-six".