266043553165466 has 4 divisors (see below), whose sum is σ = 399065329748202. Its totient is φ = 133021776582732.

The previous prime is 266043553165363. The next prime is 266043553165469. The reversal of 266043553165466 is 664561355340662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 221547596025625 + 44495957139841 = 14884475^2 + 6670529^2 .

It is a super-2 number, since 2×266043553165466² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266043553165399 and 266043553165408.

It is not an unprimeable number, because it can be changed into a prime (266043553165469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66510888291365 + ... + 66510888291368.

Almost surely, 2^{266043553165466} is an apocalyptic number.

266043553165466 is a deficient number, since it is larger than the sum of its proper divisors (133021776582736).

266043553165466 is a wasteful number, since it uses less digits than its factorization.

266043553165466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133021776582735.

The product of its (nonzero) digits is 279936000, while the sum is 62.

The spelling of 266043553165466 in words is "two hundred sixty-six trillion, forty-three billion, five hundred fifty-three million, one hundred sixty-five thousand, four hundred sixty-six".