164166644 has 12 divisors (see below), whose sum is σ = 289928100. Its totient is φ = 81330048.

The previous prime is 164166581. The next prime is 164166659. The reversal of 164166644 is 446661461.

It can be written as a sum of positive squares in 2 ways, for example, as 42902500 + 121264144 = 6550^2 + 11012^2 .

It is a junction number, because it is equal to n+sod(n) for n = 164166598 and 164166607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187829 + ... + 188700.

It is an arithmetic number, because the mean of its divisors is an integer number (24160675).

Almost surely, 2^164166644 is an apocalyptic number.

It is an amenable number.

164166644 is a deficient number, since it is larger than the sum of its proper divisors (125761456).

164166644 is a wasteful number, since it uses less digits than its factorization.

164166644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376642 (or 376640 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

The square root of 164166644 is about 12812.7531779864. The cubic root of 164166644 is about 547.5557030681. Note that the first 3 decimals are identical.

It can be divided in two parts, 16416664 and 4, that multiplied together give a palindrome (65666656).

The spelling of 164166644 in words is "one hundred sixty-four million, one hundred sixty-six thousand, six hundred forty-four".