164221696 has 18 divisors (see below), whose sum is σ = 327802412. Its totient is φ = 82110720.

The previous prime is 164221669. The next prime is 164221697. The reversal of 164221696 is 696122461.

It is not an unprimeable number, because it can be changed into a prime (164221697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320490 + ... + 321001.

Almost surely, 2^164221696 is an apocalyptic number.

164221696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

164221696 is a deficient number, since it is larger than the sum of its proper divisors (163580716).

164221696 is an frugal number, since it uses more digits than its factorization.

164221696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641507 (or 641493 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 164221696 is about 12814.9013261905. The cubic root of 164221696 is about 547.6169024018.

The spelling of 164221696 in words is "one hundred sixty-four million, two hundred twenty-one thousand, six hundred ninety-six".