266342140640 has 24 divisors (see below), whose sum is σ = 629233307640. Its totient is φ = 106536856192.

The previous prime is 266342140639. The next prime is 266342140643. The reversal of 266342140640 is 46041243662.

It is a junction number, because it is equal to n+sod(n) for n = 266342140594 and 266342140603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266342140643) 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 3 ways as a sum of consecutive naturals, for example, 832319030 + ... + 832319349.

It is an arithmetic number, because the mean of its divisors is an integer number (26218054485).

Almost surely, 2^266342140640 is an apocalyptic number.

266342140640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266342140640 is an abundant number, since it is smaller than the sum of its proper divisors (362891167000).

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

266342140640 is a wasteful number, since it uses less digits than its factorization.

266342140640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664638394 (or 1664638386 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 266342140640 in words is "two hundred sixty-six billion, three hundred forty-two million, one hundred forty thousand, six hundred forty".