71200666170661 has 4 divisors (see below), whose sum is σ = 71452258630912. Its totient is φ = 70949073710412.

The previous prime is 71200666170631. The next prime is 71200666170671. The reversal of 71200666170661 is 16607166600217.

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 not a de Polignac number, because 71200666170661 - 2¹³ = 71200666162469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71200666170631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125796229701 + ... + 125796230266.

It is an arithmetic number, because the mean of its divisors is an integer number (17863064657728).

Almost surely, 2^{71200666170661} is an apocalyptic number.

It is an amenable number.

71200666170661 is a deficient number, since it is larger than the sum of its proper divisors (251592460251).

71200666170661 is a wasteful number, since it uses less digits than its factorization.

71200666170661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251592460250.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 71200666170661 in words is "seventy-one trillion, two hundred billion, six hundred sixty-six million, one hundred seventy thousand, six hundred sixty-one".