67100681 has 2 divisors, whose sum is σ = 67100682. Its totient is φ = 67100680.

The previous prime is 67100669. The next prime is 67100687. The reversal of 67100681 is 18600176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45010681 + 22090000 = 6709^2 + 4700^2 .

It is a cyclic number.

It is not a de Polignac number, because 67100681 - 2⁶ = 67100617 is a prime.

It is a super-2 number, since 2×67100681² = 9005002781327522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (67100687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33550340 + 33550341.

It is an arithmetic number, because the mean of its divisors is an integer number (33550341).

Almost surely, 2^67100681 is an apocalyptic number.

It is an amenable number.

67100681 is a deficient number, since it is larger than the sum of its proper divisors (1).

67100681 is an equidigital number, since it uses as much as digits as its factorization.

67100681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 67100681 is about 8191.5005340902. The cubic root of 67100681 is about 406.3581513712.

The spelling of 67100681 in words is "sixty-seven million, one hundred thousand, six hundred eighty-one".