266105216233666 has 32 divisors (see below), whose sum is σ = 404560801359360. Its totient is φ = 131254566503424.

The previous prime is 266105216233621. The next prime is 266105216233667. The reversal of 266105216233666 is 666332612501662.

It is a super-2 number, since 2×266105216233666² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266105216233667) 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, 1383972651 + ... + 1384164913.

It is an arithmetic number, because the mean of its divisors is an integer number (12642525042480).

Almost surely, 2^{266105216233666} is an apocalyptic number.

266105216233666 is a deficient number, since it is larger than the sum of its proper divisors (138455585125694).

266105216233666 is a wasteful number, since it uses less digits than its factorization.

266105216233666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199890.

The product of its (nonzero) digits is 16796160, while the sum is 55.

The spelling of 266105216233666 in words is "two hundred sixty-six trillion, one hundred five billion, two hundred sixteen million, two hundred thirty-three thousand, six hundred sixty-six".