266161605624136 has 8 divisors (see below), whose sum is σ = 499053010545270. Its totient is φ = 133080802812064.

The previous prime is 266161605624119. The next prime is 266161605624139. The reversal of 266161605624136 is 631426506161662.

It can be written as a sum of positive squares in only one way, i.e., 218137953016036 + 48023652608100 = 14769494^2 + 6929910^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×266161605624136² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266161605624139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16635100351501 + ... + 16635100351516.

Almost surely, 2^{266161605624136} is an apocalyptic number.

It is an amenable number.

266161605624136 is a deficient number, since it is larger than the sum of its proper divisors (232891404921134).

266161605624136 is a wasteful number, since it uses less digits than its factorization.

266161605624136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33270200703023 (or 33270200703019 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 55.

The spelling of 266161605624136 in words is "two hundred sixty-six trillion, one hundred sixty-one billion, six hundred five million, six hundred twenty-four thousand, one hundred thirty-six".