67603561 has 2 divisors, whose sum is σ = 67603562. Its totient is φ = 67603560.

The previous prime is 67603537. The next prime is 67603589. The reversal of 67603561 is 16530676.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63297936 + 4305625 = 7956^2 + 2075^2 .

It is a cyclic number.

It is not a de Polignac number, because 67603561 - 2²¹ = 65506409 is a prime.

It is not a weakly prime, because it can be changed into another prime (67603511) 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, 33801780 + 33801781.

It is an arithmetic number, because the mean of its divisors is an integer number (33801781).

Almost surely, 2^67603561 is an apocalyptic number.

It is an amenable number.

67603561 is a deficient number, since it is larger than the sum of its proper divisors (1).

67603561 is an equidigital number, since it uses as much as digits as its factorization.

67603561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 67603561 is about 8222.1384687927. The cubic root of 67603561 is about 407.3707640916.

The spelling of 67603561 in words is "sixty-seven million, six hundred three thousand, five hundred sixty-one".