67335561 has 12 divisors (see below), whose sum is σ = 97493760. Its totient is φ = 44783640.

The previous prime is 67335553. The next prime is 67335617. The reversal of 67335561 is 16553376.

It is a happy number.

67335561 is a `hidden beast` number, since 67 + 3 + 35 + 561 = 666.

It is not a de Polignac number, because 67335561 - 2³ = 67335553 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (67335551) 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 in 11 ways as a sum of consecutive naturals, for example, 4801 + ... + 12558.

It is an arithmetic number, because the mean of its divisors is an integer number (8124480).

Almost surely, 2^67335561 is an apocalyptic number.

It is an amenable number.

67335561 is a deficient number, since it is larger than the sum of its proper divisors (30158199).

67335561 is a wasteful number, since it uses less digits than its factorization.

67335561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17796 (or 17793 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 67335561 is about 8205.8248214302. The cubic root of 67335561 is about 406.8317394738.

It can be divided in two parts, 67335 and 561, that added together give a triangular number (67896 = T₃₆₈).

The spelling of 67335561 in words is "sixty-seven million, three hundred thirty-five thousand, five hundred sixty-one".