266061162165291 has 32 divisors (see below), whose sum is σ = 401634481803840. Its totient is φ = 174013244870400.

The previous prime is 266061162165181. The next prime is 266061162165307. The reversal of 266061162165291 is 192561261160662.

It is a happy number.

266061162165291 is a `hidden beast` number, since 2 + 6 + 6 + 0 + 6 + 1 + 1 + 621 + 6 + 5 + 2 + 9 + 1 = 666.

It is not a de Polignac number, because 266061162165291 - 2¹⁵ = 266061162132523 is a prime.

It is a super-2 number, since 2×266061162165291² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266061162265291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10004421 + ... + 25143801.

It is an arithmetic number, because the mean of its divisors is an integer number (12551077556370).

Almost surely, 2^{266061162165291} is an apocalyptic number.

266061162165291 is a deficient number, since it is larger than the sum of its proper divisors (135573319638549).

266061162165291 is a wasteful number, since it uses less digits than its factorization.

266061162165291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15151724 (or 15151718 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 266061162165291 in words is "two hundred sixty-six trillion, sixty-one billion, one hundred sixty-two million, one hundred sixty-five thousand, two hundred ninety-one".