164416661 has 2 divisors, whose sum is σ = 164416662. Its totient is φ = 164416660.

The previous prime is 164416607. The next prime is 164416667. The reversal of 164416661 is 166614461.

164416661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114276100 + 50140561 = 10690^2 + 7081^2 .

It is a cyclic number.

It is not a de Polignac number, because 164416661 - 2¹⁴ = 164400277 is a prime.

It is a super-3 number, since 3×164416661³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164416667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82208330 + 82208331.

It is an arithmetic number, because the mean of its divisors is an integer number (82208331).

Almost surely, 2^164416661 is an apocalyptic number.

It is an amenable number.

164416661 is a deficient number, since it is larger than the sum of its proper divisors (1).

164416661 is an equidigital number, since it uses as much as digits as its factorization.

164416661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 164416661 is about 12822.5060343133. The cubic root of 164416661 is about 547.8335280744.

The spelling of 164416661 in words is "one hundred sixty-four million, four hundred sixteen thousand, six hundred sixty-one".