266542040 has 32 divisors (see below), whose sum is σ = 603553680. Its totient is φ = 105935232.

The previous prime is 266542033. The next prime is 266542049. The reversal of 266542040 is 40245662.

It is a junction number, because it is equal to n+sod(n) for n = 266541994 and 266542012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266542049) 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 7 ways as a sum of consecutive naturals, for example, 14942 + ... + 27501.

Almost surely, 2^266542040 is an apocalyptic number.

266542040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266542040 is an abundant number, since it is smaller than the sum of its proper divisors (337011640).

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

266542040 is a wasteful number, since it uses less digits than its factorization.

266542040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42611 (or 42607 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 266542040 is about 16326.1152758395. The cubic root of 266542040 is about 643.5593026760.

The spelling of 266542040 in words is "two hundred sixty-six million, five hundred forty-two thousand, forty".