67682457881 has 2 divisors, whose sum is σ = 67682457882. Its totient is φ = 67682457880.

The previous prime is 67682457851. The next prime is 67682457961. The reversal of 67682457881 is 18875428676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45486225625 + 22196232256 = 213275^2 + 148984^2 .

It is a cyclic number.

It is not a de Polignac number, because 67682457881 - 2²⁶ = 67615349017 is a prime.

It is a super-2 number, since 2×67682457881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67682457851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33841228940 + 33841228941.

It is an arithmetic number, because the mean of its divisors is an integer number (33841228941).

Almost surely, 2^67682457881 is an apocalyptic number.

It is an amenable number.

67682457881 is a deficient number, since it is larger than the sum of its proper divisors (1).

67682457881 is an equidigital number, since it uses as much as digits as its factorization.

67682457881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36126720, while the sum is 62.

The spelling of 67682457881 in words is "sixty-seven billion, six hundred eighty-two million, four hundred fifty-seven thousand, eight hundred eighty-one".