67015601 has 2 divisors, whose sum is σ = 67015602. Its totient is φ = 67015600.

The previous prime is 67015591. The next prime is 67015609. The reversal of 67015601 is 10651076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42562576 + 24453025 = 6524^2 + 4945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67015601 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (67015609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33507800 + 33507801.

It is an arithmetic number, because the mean of its divisors is an integer number (33507801).

Almost surely, 2^67015601 is an apocalyptic number.

It is an amenable number.

67015601 is a deficient number, since it is larger than the sum of its proper divisors (1).

67015601 is an equidigital number, since it uses as much as digits as its factorization.

67015601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 67015601 is about 8186.3056991539. The cubic root of 67015601 is about 406.1863320816.

Adding to 67015601 its reverse (10651076), we get a palindrome (77666677).

The spelling of 67015601 in words is "sixty-seven million, fifteen thousand, six hundred one".