266253620 has 12 divisors (see below), whose sum is σ = 559132644. Its totient is φ = 106501440.

The previous prime is 266253601. The next prime is 266253629. The reversal of 266253620 is 26352662.

It can be written as a sum of positive squares in 2 ways, for example, as 49928356 + 216325264 = 7066^2 + 14708^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266253629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6656321 + ... + 6656360.

It is an arithmetic number, because the mean of its divisors is an integer number (46594387).

Almost surely, 2^266253620 is an apocalyptic number.

266253620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266253620 is an abundant number, since it is smaller than the sum of its proper divisors (292879024).

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

266253620 is a wasteful number, since it uses less digits than its factorization.

266253620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13312690 (or 13312688 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 266253620 is about 16317.2797978094. The cubic root of 266253620 is about 643.3270911962.

The spelling of 266253620 in words is "two hundred sixty-six million, two hundred fifty-three thousand, six hundred twenty".