266630 has 32 divisors (see below), whose sum is σ = 592704. Its totient is φ = 84096.

The previous prime is 266603. The next prime is 266633. The reversal of 266630 is 36662.

266630 = T₁₂ + T₁₃ + ... + T₁₁₆.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 266596 and 266605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266633) by changing a digit.

266630 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 15 ways as a sum of consecutive naturals, for example, 764 + ... + 1056.

It is an arithmetic number, because the mean of its divisors is an integer number (18522).

2²⁶⁶⁶³⁰ is an apocalyptic number.

266630 is an abundant number, since it is smaller than the sum of its proper divisors (326074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266630 is a wasteful number, since it uses less digits than its factorization.

266630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 266630 is about 516.3622759265. The cubic root of 266630 is about 64.3630087320.

The spelling of 266630 in words is "two hundred sixty-six thousand, six hundred thirty".