168852661 has 2 divisors, whose sum is σ = 168852662. Its totient is φ = 168852660.

The previous prime is 168852659. The next prime is 168852707. The reversal of 168852661 is 166258861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157502500 + 11350161 = 12550^2 + 3369^2 .

It is a cyclic number.

It is not a de Polignac number, because 168852661 - 2¹ = 168852659 is a prime.

It is a super-2 number, since 2×168852661² = 57022442253561842, which contains 22 as substring.

Together with 168852659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168852161) 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, 84426330 + 84426331.

It is an arithmetic number, because the mean of its divisors is an integer number (84426331).

Almost surely, 2^168852661 is an apocalyptic number.

It is an amenable number.

168852661 is a deficient number, since it is larger than the sum of its proper divisors (1).

168852661 is an equidigital number, since it uses as much as digits as its factorization.

168852661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 43.

The square root of 168852661 is about 12994.3318797082. The cubic root of 168852661 is about 552.7167632222.

The spelling of 168852661 in words is "one hundred sixty-eight million, eight hundred fifty-two thousand, six hundred sixty-one".