266162661 has 24 divisors (see below), whose sum is σ = 392760576. Its totient is φ = 173628000.

The previous prime is 266162653. The next prime is 266162669. The reversal of 266162661 is 166261662.

It is a happy number.

266162661 is a `hidden beast` number, since 26 + 6 + 1 + 626 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (266162653) and next prime (266162669).

It is not a de Polignac number, because 266162661 - 2³ = 266162653 is a prime.

It is a super-2 number, since 2×266162661² = 141685124221201842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266162669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354036 + ... + 354786.

It is an arithmetic number, because the mean of its divisors is an integer number (16365024).

Almost surely, 2^266162661 is an apocalyptic number.

It is an amenable number.

266162661 is a deficient number, since it is larger than the sum of its proper divisors (126597915).

266162661 is a wasteful number, since it uses less digits than its factorization.

266162661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553 (or 1550 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 266162661 is about 16314.4923610880. The cubic root of 266162661 is about 643.2538238935.

Subtracting from 266162661 its reverse (166261662), we obtain a palindrome (99900999).

The spelling of 266162661 in words is "two hundred sixty-six million, one hundred sixty-two thousand, six hundred sixty-one".