7166561165263 has 16 divisors (see below), whose sum is σ = 7503595047936. Its totient is φ = 6831655871040.

The previous prime is 7166561165251. The next prime is 7166561165273. The reversal of 7166561165263 is 3625611656617.

It is a cyclic number.

It is not a de Polignac number, because 7166561165263 - 2²⁵ = 7166527610831 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 (7166561165213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39443995 + ... + 39625267.

It is an arithmetic number, because the mean of its divisors is an integer number (468974690496).

Almost surely, 2^{7166561165263} is an apocalyptic number.

7166561165263 is a deficient number, since it is larger than the sum of its proper divisors (337033882673).

7166561165263 is a wasteful number, since it uses less digits than its factorization.

7166561165263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187134.

The product of its digits is 8164800, while the sum is 55.

The spelling of 7166561165263 in words is "seven trillion, one hundred sixty-six billion, five hundred sixty-one million, one hundred sixty-five thousand, two hundred sixty-three".