266795540 has 48 divisors (see below), whose sum is σ = 617307264. Its totient is φ = 96048000.

The previous prime is 266795537. The next prime is 266795591. The reversal of 266795540 is 45597662.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 266795491 and 266795500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16217 + ... + 28223.

It is an arithmetic number, because the mean of its divisors is an integer number (12860568).

Almost surely, 2^266795540 is an apocalyptic number.

266795540 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 266795540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308653632).

266795540 is an abundant number, since it is smaller than the sum of its proper divisors (350511724).

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

266795540 is a wasteful number, since it uses less digits than its factorization.

266795540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12128 (or 12126 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 266795540 is about 16333.8770657796. The cubic root of 266795540 is about 643.7632612343.

The spelling of 266795540 in words is "two hundred sixty-six million, seven hundred ninety-five thousand, five hundred forty".