164670641 has 2 divisors, whose sum is σ = 164670642. Its totient is φ = 164670640.

The previous prime is 164670601. The next prime is 164670643. The reversal of 164670641 is 146076461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132135025 + 32535616 = 11495^2 + 5704^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164670641 is a prime.

Together with 164670643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164670643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82335320 + 82335321.

It is an arithmetic number, because the mean of its divisors is an integer number (82335321).

Almost surely, 2^164670641 is an apocalyptic number.

It is an amenable number.

164670641 is a deficient number, since it is larger than the sum of its proper divisors (1).

164670641 is an equidigital number, since it uses as much as digits as its factorization.

164670641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 164670641 is about 12832.4058928948. The cubic root of 164670641 is about 548.1154686351.

The spelling of 164670641 in words is "one hundred sixty-four million, six hundred seventy thousand, six hundred forty-one".