67507481 has 2 divisors, whose sum is σ = 67507482. Its totient is φ = 67507480.

The previous prime is 67507471. The next prime is 67507501. The reversal of 67507481 is 18470576.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64947481 + 2560000 = 8059^2 + 1600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67507481 is a prime.

It is a super-2 number, since 2×67507481² = 9114519981930722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67507411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33753740 + 33753741.

It is an arithmetic number, because the mean of its divisors is an integer number (33753741).

Almost surely, 2^67507481 is an apocalyptic number.

It is an amenable number.

67507481 is a deficient number, since it is larger than the sum of its proper divisors (1).

67507481 is an equidigital number, since it uses as much as digits as its factorization.

67507481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 67507481 is about 8216.2936291250. The cubic root of 67507481 is about 407.1776838285.

The spelling of 67507481 in words is "sixty-seven million, five hundred seven thousand, four hundred eighty-one".