68216771 has 12 divisors (see below), whose sum is σ = 81915840. Its totient is φ = 56584080.

The previous prime is 68216761. The next prime is 68216807. The reversal of 68216771 is 17761286.

It is not a de Polignac number, because 68216771 - 2²² = 64022467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68216741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20936 + ... + 23973.

It is an arithmetic number, because the mean of its divisors is an integer number (6826320).

Almost surely, 2^68216771 is an apocalyptic number.

68216771 is a deficient number, since it is larger than the sum of its proper divisors (13699069).

68216771 is a wasteful number, since it uses less digits than its factorization.

68216771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44954 (or 44947 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 68216771 is about 8259.3444655130. The cubic root of 68216771 is about 408.5987680079.

The spelling of 68216771 in words is "sixty-eight million, two hundred sixteen thousand, seven hundred seventy-one".