266726460 has 192 divisors, whose sum is σ = 1002968064. Its totient is φ = 51148800.

The previous prime is 266726441. The next prime is 266726461. The reversal of 266726460 is 64627662.

It is a super-2 number, since 2×266726460² = 142286008928263200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266726461) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 57840 + ... + 62280.

It is an arithmetic number, because the mean of its divisors is an integer number (5223792).

Almost surely, 2^266726460 is an apocalyptic number.

266726460 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 266726460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501484032).

266726460 is an abundant number, since it is smaller than the sum of its proper divisors (736241604).

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

266726460 is a wasteful number, since it uses less digits than its factorization.

266726460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4484 (or 4482 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 266726460 is about 16331.7623053974. The cubic root of 266726460 is about 643.7076943324.

The spelling of 266726460 in words is "two hundred sixty-six million, seven hundred twenty-six thousand, four hundred sixty".