2166221655354 has 16 divisors (see below), whose sum is σ = 4332591110592. Its totient is φ = 722049251808.

The previous prime is 2166221655347. The next prime is 2166221655397. The reversal of 2166221655354 is 4535561226612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5967339 + ... + 6319934.

It is an arithmetic number, because the mean of its divisors is an integer number (270786944412).

Almost surely, 2^{2166221655354} is an apocalyptic number.

2166221655354 is an abundant number, since it is smaller than the sum of its proper divisors (2166369455238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2166221655354 is a wasteful number, since it uses less digits than its factorization.

2166221655354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12316661.

The product of its digits is 2592000, while the sum is 48.

The spelling of 2166221655354 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-one million, six hundred fifty-five thousand, three hundred fifty-four".