266666698 has 16 divisors (see below), whose sum is σ = 404957160. Its totient is φ = 131691456.

The previous prime is 266666671. The next prime is 266666723. The reversal of 266666698 is 896666662.

It is a happy number.

266666698 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 264485169 + 2181529 = 16263^2 + 1477^2 .

It is a super-2 number, since 2×266666698² = 142222255644446408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51868 + ... + 56776.

Almost surely, 2^266666698 is an apocalyptic number.

266666698 is a deficient number, since it is larger than the sum of its proper divisors (138290462).

266666698 is a wasteful number, since it uses less digits than its factorization.

266666698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5241.

The product of its digits is 6718464, while the sum is 55.

The square root of 266666698 is about 16329.9325779380. The cubic root of 266666698 is about 643.6596149471.

It can be divided in two parts, 26 and 6666698, that added together give a square (6666724 = 2582²).

The spelling of 266666698 in words is "two hundred sixty-six million, six hundred sixty-six thousand, six hundred ninety-eight".