266265563257400 has 96 divisors (see below), whose sum is σ = 707511177636480. Its totient is φ = 91290335664000.

The previous prime is 266265563257321. The next prime is 266265563257451. The reversal of 266265563257400 is 4752365562662.

It is a self number, because there is not a number n which added to its sum of digits gives 266265563257400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196909595 + ... + 198257205.

It is an arithmetic number, because the mean of its divisors is an integer number (7369908100380).

Almost surely, 2^{266265563257400} is an apocalyptic number.

266265563257400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266265563257400 is an abundant number, since it is smaller than the sum of its proper divisors (441245614379080).

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

266265563257400 is a wasteful number, since it uses less digits than its factorization.

266265563257400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488765 (or 1488756 counting only the distinct ones).

The product of its (nonzero) digits is 108864000, while the sum is 59.

The spelling of 266265563257400 in words is "two hundred sixty-six trillion, two hundred sixty-five billion, five hundred sixty-three million, two hundred fifty-seven thousand, four hundred".