2166221654607 has 8 divisors (see below), whose sum is σ = 2889499507200. Its totient is φ = 1443545785880.

The previous prime is 2166221654599. The next prime is 2166221654711. The reversal of 2166221654607 is 7064561226612.

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

It is a cyclic number.

It is not a de Polignac number, because 2166221654607 - 2³ = 2166221654599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166221674607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150487569 + ... + 150501962.

It is an arithmetic number, because the mean of its divisors is an integer number (361187438400).

Almost surely, 2^{2166221654607} is an apocalyptic number.

2166221654607 is a deficient number, since it is larger than the sum of its proper divisors (723277852593).

2166221654607 is a wasteful number, since it uses less digits than its factorization.

2166221654607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300991933.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 2166221654607 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-one million, six hundred fifty-four thousand, six hundred seven".