7171166606561 has 4 divisors (see below), whose sum is σ = 7201171488000. Its totient is φ = 7141161725124.

The previous prime is 7171166606479. The next prime is 7171166606579. The reversal of 7171166606561 is 1656066611717.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7171166606561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7171166636561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15002440361 + ... + 15002440838.

It is an arithmetic number, because the mean of its divisors is an integer number (1800292872000).

Almost surely, 2^{7171166606561} is an apocalyptic number.

It is an amenable number.

7171166606561 is a deficient number, since it is larger than the sum of its proper divisors (30004881439).

7171166606561 is a wasteful number, since it uses less digits than its factorization.

7171166606561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30004881438.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 7171166606561 in words is "seven trillion, one hundred seventy-one billion, one hundred sixty-six million, six hundred six thousand, five hundred sixty-one".