221166622326 has 64 divisors (see below), whose sum is σ = 477735148800. Its totient is φ = 67854917760.

The previous prime is 221166622289. The next prime is 221166622331. The reversal of 221166622326 is 623226661122.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74641321 + ... + 74644283.

It is an arithmetic number, because the mean of its divisors is an integer number (7464611700).

Almost surely, 2^221166622326 is an apocalyptic number.

221166622326 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

221166622326 is an abundant number, since it is smaller than the sum of its proper divisors (256568526474).

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

221166622326 is a wasteful number, since it uses less digits than its factorization.

221166622326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5421.

The product of its digits is 124416, while the sum is 39.

The spelling of 221166622326 in words is "two hundred twenty-one billion, one hundred sixty-six million, six hundred twenty-two thousand, three hundred twenty-six".