266563000 has 96 divisors (see below), whose sum is σ = 685928880. Its totient is φ = 96888000.

The previous prime is 266562997. The next prime is 266563019. The reversal of 266563000 is 365662.

It is a self number, because there is not a number n which added to its sum of digits gives 266563000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119899 + ... + 122101.

Almost surely, 2^266563000 is an apocalyptic number.

266563000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266563000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342964440).

266563000 is an abundant number, since it is smaller than the sum of its proper divisors (419365880).

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

266563000 is a wasteful number, since it uses less digits than its factorization.

266563000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246 (or 2221 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 266563000 is about 16326.7571795504. The cubic root of 266563000 is about 643.5761713714.

The spelling of 266563000 in words is "two hundred sixty-six million, five hundred sixty-three thousand".