68072081 has 16 divisors (see below), whose sum is σ = 85719168. Its totient is φ = 52512000.

The previous prime is 68072071. The next prime is 68072107. The reversal of 68072081 is 18027086.

It is a cyclic number.

It is not a de Polignac number, because 68072081 - 2¹⁰ = 68071057 is a prime.

It is a super-2 number, since 2×68072081² = 9267616423341122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68072021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3401 + ... + 12153.

It is an arithmetic number, because the mean of its divisors is an integer number (5357448).

Almost surely, 2^68072081 is an apocalyptic number.

It is an amenable number.

68072081 is a deficient number, since it is larger than the sum of its proper divisors (17647087).

68072081 is a wasteful number, since it uses less digits than its factorization.

68072081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8872.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 68072081 is about 8250.5806462333. The cubic root of 68072081 is about 408.3096797442.

It can be divided in two parts, 6807 and 2081, that added together give a palindrome (8888).

The spelling of 68072081 in words is "sixty-eight million, seventy-two thousand, eighty-one".