266005140 has 48 divisors (see below), whose sum is σ = 757034880. Its totient is φ = 69770880.

The previous prime is 266005093. The next prime is 266005147. The reversal of 266005140 is 41500662.

It is a self number, because there is not a number n which added to its sum of digits gives 266005140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266005147) by changing a digit.

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, 32680 + ... + 39999.

It is an arithmetic number, because the mean of its divisors is an integer number (15771560).

Almost surely, 2^266005140 is an apocalyptic number.

266005140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266005140 is an abundant number, since it is smaller than the sum of its proper divisors (491029740).

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

266005140 is a wasteful number, since it uses less digits than its factorization.

266005140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72752 (or 72750 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 266005140 is about 16309.6640063491. The cubic root of 266005140 is about 643.1269015311.

The spelling of 266005140 in words is "two hundred sixty-six million, five thousand, one hundred forty".