266990 has 8 divisors (see below), whose sum is σ = 480600. Its totient is φ = 106792.

The previous prime is 266983. The next prime is 266993. The reversal of 266990 is 99662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266993) by changing a digit.

266990 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13340 + ... + 13359.

It is an arithmetic number, because the mean of its divisors is an integer number (60075).

2²⁶⁶⁹⁹⁰ is an apocalyptic number.

266990 is a deficient number, since it is larger than the sum of its proper divisors (213610).

266990 is a wasteful number, since it uses less digits than its factorization.

266990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26706.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 266990 is about 516.7107508075. The cubic root of 266990 is about 64.3919630416.

The spelling of 266990 in words is "two hundred sixty-six thousand, nine hundred ninety".