266501140 has 12 divisors (see below), whose sum is σ = 559652436. Its totient is φ = 106600448.

The previous prime is 266501083. The next prime is 266501149. The reversal of 266501140 is 41105662.

It can be written as a sum of positive squares in 2 ways, for example, as 73513476 + 192987664 = 8574^2 + 13892^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266501149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6662509 + ... + 6662548.

It is an arithmetic number, because the mean of its divisors is an integer number (46637703).

Almost surely, 2^266501140 is an apocalyptic number.

266501140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266501140 is an abundant number, since it is smaller than the sum of its proper divisors (293151296).

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

266501140 is a wasteful number, since it uses less digits than its factorization.

266501140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13325066 (or 13325064 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 266501140 is about 16324.8626334190. The cubic root of 266501140 is about 643.5263836389.

The spelling of 266501140 in words is "two hundred sixty-six million, five hundred one thousand, one hundred forty".