67711481 has 2 divisors, whose sum is σ = 67711482. Its totient is φ = 67711480.

The previous prime is 67711477. The next prime is 67711499. The reversal of 67711481 is 18411776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41538025 + 26173456 = 6445^2 + 5116^2 .

It is a cyclic number.

It is not a de Polignac number, because 67711481 - 2² = 67711477 is a prime.

It is a super-2 number, since 2×67711481² = 9169689318426722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67711451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33855740 + 33855741.

It is an arithmetic number, because the mean of its divisors is an integer number (33855741).

Almost surely, 2^67711481 is an apocalyptic number.

It is an amenable number.

67711481 is a deficient number, since it is larger than the sum of its proper divisors (1).

67711481 is an equidigital number, since it uses as much as digits as its factorization.

67711481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 35.

The square root of 67711481 is about 8228.6986212888. The cubic root of 67711481 is about 407.5874197383.

The spelling of 67711481 in words is "sixty-seven million, seven hundred eleven thousand, four hundred eighty-one".