266012540 has 48 divisors (see below), whose sum is σ = 589680000. Its totient is φ = 100521792.

The previous prime is 266012473. The next prime is 266012569. The reversal of 266012540 is 45210662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176711 + ... + 178209.

It is an arithmetic number, because the mean of its divisors is an integer number (12285000).

Almost surely, 2^266012540 is an apocalyptic number.

266012540 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 266012540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294840000).

266012540 is an abundant number, since it is smaller than the sum of its proper divisors (323667460).

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

266012540 is a wasteful number, since it uses less digits than its factorization.

266012540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994 (or 1992 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 266012540 is about 16309.8908641352. The cubic root of 266012540 is about 643.1328651939.

The spelling of 266012540 in words is "two hundred sixty-six million, twelve thousand, five hundred forty".