221672066889 has 32 divisors (see below), whose sum is σ = 365400899584. Its totient is φ = 116401561920.

The previous prime is 221672066881. The next prime is 221672066893. The reversal of 221672066889 is 988660276122.

It is a happy number.

It is not a de Polignac number, because 221672066889 - 2³ = 221672066881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221672066881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1759717 + ... + 1881474.

It is an arithmetic number, because the mean of its divisors is an integer number (11418778112).

Almost surely, 2^221672066889 is an apocalyptic number.

It is an amenable number.

221672066889 is a deficient number, since it is larger than the sum of its proper divisors (143728832695).

221672066889 is a wasteful number, since it uses less digits than its factorization.

221672066889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641437.

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 221672066889 in words is "two hundred twenty-one billion, six hundred seventy-two million, sixty-six thousand, eight hundred eighty-nine".