266650 has 12 divisors (see below), whose sum is σ = 496062. Its totient is φ = 106640.

The previous prime is 266647. The next prime is 266663. The reversal of 266650 is 56662.

266650 = T₄₄ + T₄₅ + ... + T₁₁₈.

It can be written as a sum of positive squares in 3 ways, for example, as 259081 + 7569 = 509^2 + 87^2 .

It is a super-2 number, since 2×266650² = 142204445000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2617 + ... + 2716.

2²⁶⁶⁶⁵⁰ is an apocalyptic number.

266650 is a deficient number, since it is larger than the sum of its proper divisors (229412).

266650 is a wasteful number, since it uses less digits than its factorization.

266650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5345 (or 5340 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 266650 is about 516.3816418116. The cubic root of 266650 is about 64.3646179883.

The spelling of 266650 in words is "two hundred sixty-six thousand, six hundred fifty".