164782661 has 2 divisors, whose sum is σ = 164782662. Its totient is φ = 164782660.

The previous prime is 164782643. The next prime is 164782679. The reversal of 164782661 is 166287461.

It is a balanced prime because it is at equal distance from previous prime (164782643) and next prime (164782679).

It can be written as a sum of positive squares in only one way, i.e., 117310561 + 47472100 = 10831^2 + 6890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164782661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164782621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82391330 + 82391331.

It is an arithmetic number, because the mean of its divisors is an integer number (82391331).

Almost surely, 2^164782661 is an apocalyptic number.

It is an amenable number.

164782661 is a deficient number, since it is larger than the sum of its proper divisors (1).

164782661 is an equidigital number, since it uses as much as digits as its factorization.

164782661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 164782661 is about 12836.7698818667. The cubic root of 164782661 is about 548.2397287479.

The spelling of 164782661 in words is "one hundred sixty-four million, seven hundred eighty-two thousand, six hundred sixty-one".