67975561 has 8 divisors (see below), whose sum is σ = 70199360. Its totient is φ = 65781072.

The previous prime is 67975547. The next prime is 67975577. The reversal of 67975561 is 16557976.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67975561 - 2⁹ = 67975049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67975541) 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 7 ways as a sum of consecutive naturals, for example, 2565 + ... + 11938.

It is an arithmetic number, because the mean of its divisors is an integer number (8774920).

Almost surely, 2^67975561 is an apocalyptic number.

It is an amenable number.

67975561 is a deficient number, since it is larger than the sum of its proper divisors (2223799).

67975561 is a wasteful number, since it uses less digits than its factorization.

67975561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14655.

The product of its digits is 396900, while the sum is 46.

The square root of 67975561 is about 8244.7292860348. The cubic root of 67975561 is about 408.1166065047.

The spelling of 67975561 in words is "sixty-seven million, nine hundred seventy-five thousand, five hundred sixty-one".