21667062656630 has 16 divisors (see below), whose sum is σ = 41053381876080. Its totient is φ = 8210676375072.

The previous prime is 21667062656621. The next prime is 21667062656677. The reversal of 21667062656630 is 3665626076612.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57018585749 + ... + 57018586128.

It is an arithmetic number, because the mean of its divisors is an integer number (2565836367255).

Almost surely, 2^{21667062656630} is an apocalyptic number.

21667062656630 is a deficient number, since it is larger than the sum of its proper divisors (19386319219450).

21667062656630 is a wasteful number, since it uses less digits than its factorization.

21667062656630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114037171903.

The product of its (nonzero) digits is 19595520, while the sum is 56.

The spelling of 21667062656630 in words is "twenty-one trillion, six hundred sixty-seven billion, sixty-two million, six hundred fifty-six thousand, six hundred thirty".