68866169 has 2 divisors, whose sum is σ = 68866170. Its totient is φ = 68866168.

The previous prime is 68866141. The next prime is 68866181. The reversal of 68866169 is 96166886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63043600 + 5822569 = 7940^2 + 2413^2 .

It is a cyclic number.

It is not a de Polignac number, because 68866169 - 2⁸ = 68865913 is a prime.

It is a super-2 number, since 2×68866169² = 9485098465473122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68866129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34433084 + 34433085.

It is an arithmetic number, because the mean of its divisors is an integer number (34433085).

Almost surely, 2^68866169 is an apocalyptic number.

It is an amenable number.

68866169 is a deficient number, since it is larger than the sum of its proper divisors (1).

68866169 is an equidigital number, since it uses as much as digits as its factorization.

68866169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 50.

The square root of 68866169 is about 8298.5642734150. The cubic root of 68866169 is about 409.8912442060.

The spelling of 68866169 in words is "sixty-eight million, eight hundred sixty-six thousand, one hundred sixty-nine".