71668863 has 24 divisors (see below), whose sum is σ = 118778400. Its totient is φ = 40791744.

The previous prime is 71668859. The next prime is 71668867. The reversal of 71668863 is 36886617.

It is an interprime number because it is at equal distance from previous prime (71668859) and next prime (71668867).

It is not a de Polignac number, because 71668863 - 2² = 71668859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71668867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14833 + ... + 19061.

It is an arithmetic number, because the mean of its divisors is an integer number (4949100).

Almost surely, 2^71668863 is an apocalyptic number.

71668863 is a deficient number, since it is larger than the sum of its proper divisors (47109537).

71668863 is a wasteful number, since it uses less digits than its factorization.

71668863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4511 (or 4508 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 71668863 is about 8465.7464526172. The cubic root of 71668863 is about 415.3780133408.

The spelling of 71668863 in words is "seventy-one million, six hundred sixty-eight thousand, eight hundred sixty-three".