67660081 has 2 divisors, whose sum is σ = 67660082. Its totient is φ = 67660080.

The previous prime is 67660069. The next prime is 67660091. The reversal of 67660081 is 18006676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66994225 + 665856 = 8185^2 + 816^2 .

It is a cyclic number.

It is not a de Polignac number, because 67660081 - 2⁵ = 67660049 is a prime.

It is a super-2 number, since 2×67660081² = 9155773121853122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67660091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33830040 + 33830041.

It is an arithmetic number, because the mean of its divisors is an integer number (33830041).

Almost surely, 2^67660081 is an apocalyptic number.

It is an amenable number.

67660081 is a deficient number, since it is larger than the sum of its proper divisors (1).

67660081 is an equidigital number, since it uses as much as digits as its factorization.

67660081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 67660081 is about 8225.5748127411. The cubic root of 67660081 is about 407.4842599965.

The spelling of 67660081 in words is "sixty-seven million, six hundred sixty thousand, eighty-one".