67160021 has 2 divisors, whose sum is σ = 67160022. Its totient is φ = 67160020.

The previous prime is 67159997. The next prime is 67160059. The reversal of 67160021 is 12006176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48790225 + 18369796 = 6985^2 + 4286^2 .

It is a cyclic number.

It is not a de Polignac number, because 67160021 - 2²⁶ = 51157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67160221) 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 as a sum of consecutive naturals, namely, 33580010 + 33580011.

It is an arithmetic number, because the mean of its divisors is an integer number (33580011).

Almost surely, 2^67160021 is an apocalyptic number.

It is an amenable number.

67160021 is a deficient number, since it is larger than the sum of its proper divisors (1).

67160021 is an equidigital number, since it uses as much as digits as its factorization.

67160021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 67160021 is about 8195.1217806693. The cubic root of 67160021 is about 406.4779027045.

Adding to 67160021 its reverse (12006176), we get a palindrome (79166197).

The spelling of 67160021 in words is "sixty-seven million, one hundred sixty thousand, twenty-one".