266140020 has 48 divisors (see below), whose sum is σ = 763374528. Its totient is φ = 69239040.

The previous prime is 266140009. The next prime is 266140027. The reversal of 266140020 is 20041662.

It is a happy number.

266140020 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

266140020 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266140027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51634 + ... + 56553.

It is an arithmetic number, because the mean of its divisors is an integer number (15903636).

Almost surely, 2^266140020 is an apocalyptic number.

266140020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266140020 is an abundant number, since it is smaller than the sum of its proper divisors (497234508).

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

266140020 is a wasteful number, since it uses less digits than its factorization.

266140020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108240 (or 108238 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 266140020 is about 16313.7984540695. The cubic root of 266140020 is about 643.2355840162.

Adding to 266140020 its reverse (20041662), we get a palindrome (286181682).

The spelling of 266140020 in words is "two hundred sixty-six million, one hundred forty thousand, twenty".