266940 has 36 divisors (see below), whose sum is σ = 810264. Its totient is φ = 71136.

The previous prime is 266933. The next prime is 266947. The reversal of 266940 is 49662.

It is an interprime number because it is at equal distance from previous prime (266933) and next prime (266947).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266947) by changing a digit.

266940 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 11 ways as a sum of consecutive naturals, for example, 562 + ... + 921.

2²⁶⁶⁹⁴⁰ is an apocalyptic number.

266940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266940 is an abundant number, since it is smaller than the sum of its proper divisors (543324).

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

266940 is a wasteful number, since it uses less digits than its factorization.

266940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 266940 is about 516.6623655735. The cubic root of 266940 is about 64.3879431668.

The spelling of 266940 in words is "two hundred sixty-six thousand, nine hundred forty".