71166869 has 2 divisors, whose sum is σ = 71166870. Its totient is φ = 71166868.

The previous prime is 71166839. The next prime is 71166911. The reversal of 71166869 is 96866117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45024100 + 26142769 = 6710^2 + 5113^2 .

It is a cyclic number.

It is not a de Polignac number, because 71166869 - 2¹⁶ = 71101333 is a prime.

It is a super-2 number, since 2×71166869² = 10129446486526322, which contains 22 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 (71166829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35583434 + 35583435.

It is an arithmetic number, because the mean of its divisors is an integer number (35583435).

Almost surely, 2^71166869 is an apocalyptic number.

It is an amenable number.

71166869 is a deficient number, since it is larger than the sum of its proper divisors (1).

71166869 is an equidigital number, since it uses as much as digits as its factorization.

71166869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 71166869 is about 8436.0458154280. The cubic root of 71166869 is about 414.4059221245.

The spelling of 71166869 in words is "seventy-one million, one hundred sixty-six thousand, eight hundred sixty-nine".