164049661 has 2 divisors, whose sum is σ = 164049662. Its totient is φ = 164049660.

The previous prime is 164049653. The next prime is 164049673. The reversal of 164049661 is 166940461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106213636 + 57836025 = 10306^2 + 7605^2 .

It is a cyclic number.

It is not a de Polignac number, because 164049661 - 2³ = 164049653 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164049661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164049631) by changing a digit.

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 as a sum of consecutive naturals, namely, 82024830 + 82024831.

It is an arithmetic number, because the mean of its divisors is an integer number (82024831).

Almost surely, 2^164049661 is an apocalyptic number.

It is an amenable number.

164049661 is a deficient number, since it is larger than the sum of its proper divisors (1).

164049661 is an equidigital number, since it uses as much as digits as its factorization.

164049661 is an odious number, because the sum of its binary digits is odd.

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

The square root of 164049661 is about 12808.1872644024. The cubic root of 164049661 is about 547.4256118224.

The spelling of 164049661 in words is "one hundred sixty-four million, forty-nine thousand, six hundred sixty-one".