266540250 has 64 divisors (see below), whose sum is σ = 667585152. Its totient is φ = 70832000.

The previous prime is 266540249. The next prime is 266540269. The reversal of 266540250 is 52045662.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349870 + ... + 350630.

It is an arithmetic number, because the mean of its divisors is an integer number (10431018).

Almost surely, 2^266540250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266540250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333792576).

266540250 is an abundant number, since it is smaller than the sum of its proper divisors (401044902).

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

266540250 is a wasteful number, since it uses less digits than its factorization.

266540250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 266540250 is about 16326.0604556029. The cubic root of 266540250 is about 643.5578620355.

The spelling of 266540250 in words is "two hundred sixty-six million, five hundred forty thousand, two hundred fifty".