2166221646326 has 8 divisors (see below), whose sum is σ = 3249742090224. Its totient is φ = 1082974282920.

The previous prime is 2166221646319. The next prime is 2166221646367. The reversal of 2166221646326 is 6236461226612.

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

It is a super-2 number, since 2×2166221646326² (a number of 25 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, 68250290 + ... + 68282021.

It is an arithmetic number, because the mean of its divisors is an integer number (406217761278).

Almost surely, 2^{2166221646326} is an apocalyptic number.

2166221646326 is a deficient number, since it is larger than the sum of its proper divisors (1083520443898).

2166221646326 is a wasteful number, since it uses less digits than its factorization.

2166221646326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136540246.

The product of its digits is 1492992, while the sum is 47.

The spelling of 2166221646326 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-one million, six hundred forty-six thousand, three hundred twenty-six".