266698 has 4 divisors (see below), whose sum is σ = 400050. Its totient is φ = 133348.

The previous prime is 266689. The next prime is 266701. The reversal of 266698 is 896662.

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., 253009 + 13689 = 503^2 + 117^2 .

It is a super-2 number, since 2×266698² = 142255646408, which contains 22 as substring.

It is an Ulam number.

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 as a sum of consecutive naturals, namely, 66673 + ... + 66676.

2²⁶⁶⁶⁹⁸ is an apocalyptic number.

266698 is a deficient number, since it is larger than the sum of its proper divisors (133352).

266698 is a wasteful number, since it uses less digits than its factorization.

266698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133351.

The product of its digits is 31104, while the sum is 37.

The square root of 266698 is about 516.4281169727. The cubic root of 266698 is about 64.3684798750.

It can be divided in two parts, 26 and 6698, that added together give a square (6724 = 82²).

The spelling of 266698 in words is "two hundred sixty-six thousand, six hundred ninety-eight".