10261166566 has 16 divisors (see below), whose sum is σ = 17596436256. Its totient is φ = 4396176576.

The previous prime is 10261166521. The next prime is 10261166569. The reversal of 10261166566 is 66566116201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10261166569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78151 + ... + 163186.

It is an arithmetic number, because the mean of its divisors is an integer number (1099777266).

Almost surely, 2^10261166566 is an apocalyptic number.

10261166566 is a deficient number, since it is larger than the sum of its proper divisors (7335269690).

10261166566 is a wasteful number, since it uses less digits than its factorization.

10261166566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244383.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 10261166566 in words is "ten billion, two hundred sixty-one million, one hundred sixty-six thousand, five hundred sixty-six".