166420426621222 has 8 divisors (see below), whose sum is σ = 253722945504672. Its totient is φ = 81846111453000.

The previous prime is 166420426621187. The next prime is 166420426621231. The reversal of 166420426621222 is 222126624024661.

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

It is a super-2 number, since 2×166420426621222² (a number of 29 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 682050928654 + ... + 682050928897.

It is an arithmetic number, because the mean of its divisors is an integer number (31715368188084).

Almost surely, 2^{166420426621222} is an apocalyptic number.

166420426621222 is a deficient number, since it is larger than the sum of its proper divisors (87302518883450).

166420426621222 is a wasteful number, since it uses less digits than its factorization.

166420426621222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364101857614.

The product of its (nonzero) digits is 1327104, while the sum is 46.

The spelling of 166420426621222 in words is "one hundred sixty-six trillion, four hundred twenty billion, four hundred twenty-six million, six hundred twenty-one thousand, two hundred twenty-two".