21666014661422 has 8 divisors (see below), whose sum is σ = 32501931256872. Its totient is φ = 10832037575800.

The previous prime is 21666014661329. The next prime is 21666014661439. The reversal of 21666014661422 is 22416641066612.

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

It is a super-2 number, since 2×21666014661422² (a number of 27 digits) contains 22 as substring.

It is a congruent 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, 484849529 + ... + 484894212.

It is an arithmetic number, because the mean of its divisors is an integer number (4062741407109).

Almost surely, 2^{21666014661422} is an apocalyptic number.

21666014661422 is a deficient number, since it is larger than the sum of its proper divisors (10835916595450).

21666014661422 is a wasteful number, since it uses less digits than its factorization.

21666014661422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969754914.

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 21666014661422 in words is "twenty-one trillion, six hundred sixty-six billion, fourteen million, six hundred sixty-one thousand, four hundred twenty-two".