67716081 has 18 divisors (see below), whose sum is σ = 101578802. Its totient is φ = 45139680.

The previous prime is 67716017. The next prime is 67716107. The reversal of 67716081 is 18061776.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 59213025 + 8503056 = 7695^2 + 2916^2 .

It is not a de Polignac number, because 67716081 - 2⁶ = 67716017 is a prime.

It is a super-2 number, since 2×67716081² = 9170935251997122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67716001) 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 17 ways as a sum of consecutive naturals, for example, 1401 + ... + 11721.

Almost surely, 2^67716081 is an apocalyptic number.

It is an amenable number.

67716081 is a deficient number, since it is larger than the sum of its proper divisors (33862721).

67716081 is an frugal number, since it uses more digits than its factorization.

67716081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10345 (or 10324 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 67716081 is about 8228.9781261102. The cubic root of 67716081 is about 407.5966493876.

The spelling of 67716081 in words is "sixty-seven million, seven hundred sixteen thousand, eighty-one".