21336674666 has 8 divisors (see below), whose sum is σ = 32005740000. Its totient is φ = 10668094668.

The previous prime is 21336674641. The next prime is 21336674747. The reversal of 21336674666 is 66647663312.

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, 22835 + ... + 207833.

It is an arithmetic number, because the mean of its divisors is an integer number (4000717500).

Almost surely, 2^21336674666 is an apocalyptic number.

21336674666 is a deficient number, since it is larger than the sum of its proper divisors (10669065334).

21336674666 is a wasteful number, since it uses less digits than its factorization.

21336674666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242668.

The product of its digits is 3919104, while the sum is 50.

The spelling of 21336674666 in words is "twenty-one billion, three hundred thirty-six million, six hundred seventy-four thousand, six hundred sixty-six".