266440371560 has 64 divisors (see below), whose sum is σ = 661338302400. Its totient is φ = 95798771200.

The previous prime is 266440371553. The next prime is 266440371577. The reversal of 266440371560 is 65173044662.

266440371560 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3362786 + ... + 3441105.

It is an arithmetic number, because the mean of its divisors is an integer number (10333410975).

Almost surely, 2^266440371560 is an apocalyptic number.

266440371560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266440371560 is an abundant number, since it is smaller than the sum of its proper divisors (394897930840).

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

266440371560 is a wasteful number, since it uses less digits than its factorization.

266440371560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6804002 (or 6803998 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 266440371560 in words is "two hundred sixty-six billion, four hundred forty million, three hundred seventy-one thousand, five hundred sixty".