68367681 has 24 divisors (see below), whose sum is σ = 105225120. Its totient is φ = 42650496.

The previous prime is 68367583. The next prime is 68367701. The reversal of 68367681 is 18676386.

It is not a de Polignac number, because 68367681 - 2¹⁸ = 68105537 is a prime.

It is a super-2 number, since 2×68367681² = 9348279610635522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68367881) 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, 11785 + ... + 16601.

It is an arithmetic number, because the mean of its divisors is an integer number (4384380).

Almost surely, 2^68367681 is an apocalyptic number.

It is an amenable number.

68367681 is a deficient number, since it is larger than the sum of its proper divisors (36857439).

68367681 is a wasteful number, since it uses less digits than its factorization.

68367681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4925 (or 4922 counting only the distinct ones).

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

The square root of 68367681 is about 8268.4751314859. The cubic root of 68367681 is about 408.8998485459.

The spelling of 68367681 in words is "sixty-eight million, three hundred sixty-seven thousand, six hundred eighty-one".