75565406673667 has 4 divisors (see below), whose sum is σ = 75838205976016. Its totient is φ = 75292607371320.

The previous prime is 75565406673599. The next prime is 75565406673733. The reversal of 75565406673667 is 76637660456557.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75565406673667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75565406673667.

It is not an unprimeable number, because it can be changed into a prime (75565406643667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136399650759 + ... + 136399651312.

It is an arithmetic number, because the mean of its divisors is an integer number (18959551494004).

Almost surely, 2^{75565406673667} is an apocalyptic number.

75565406673667 is a deficient number, since it is larger than the sum of its proper divisors (272799302349).

75565406673667 is a wasteful number, since it uses less digits than its factorization.

75565406673667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272799302348.

The product of its (nonzero) digits is 4000752000, while the sum is 73.

The spelling of 75565406673667 in words is "seventy-five trillion, five hundred sixty-five billion, four hundred six million, six hundred seventy-three thousand, six hundred sixty-seven".