67861081 has 2 divisors, whose sum is σ = 67861082. Its totient is φ = 67861080.

The previous prime is 67861069. The next prime is 67861099. The reversal of 67861081 is 18016876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67568400 + 292681 = 8220^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 67861081 - 2²³ = 59472473 is a prime.

It is a super-2 number, since 2×67861081² = 9210252628977122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67861081.

It is not a weakly prime, because it can be changed into another prime (67861481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33930540 + 33930541.

It is an arithmetic number, because the mean of its divisors is an integer number (33930541).

Almost surely, 2^67861081 is an apocalyptic number.

It is an amenable number.

67861081 is a deficient number, since it is larger than the sum of its proper divisors (1).

67861081 is an equidigital number, since it uses as much as digits as its factorization.

67861081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 67861081 is about 8237.7837432164. The cubic root of 67861081 is about 407.8873699906.

The spelling of 67861081 in words is "sixty-seven million, eight hundred sixty-one thousand, eighty-one".