266042340 has 48 divisors (see below), whose sum is σ = 827688960. Its totient is φ = 70944480.

The previous prime is 266042323. The next prime is 266042347. The reversal of 266042340 is 43240662.

266042340 is a `hidden beast` number, since 26 + 604 + 2 + 34 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (266042347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245796 + ... + 246875.

It is an arithmetic number, because the mean of its divisors is an integer number (17243520).

Almost surely, 2^266042340 is an apocalyptic number.

266042340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266042340 is an abundant number, since it is smaller than the sum of its proper divisors (561646620).

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

266042340 is a wasteful number, since it uses less digits than its factorization.

266042340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492689 (or 492681 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 266042340 is about 16310.8043946336. The cubic root of 266042340 is about 643.1568799061.

The spelling of 266042340 in words is "two hundred sixty-six million, forty-two thousand, three hundred forty".