266243742744 has 64 divisors (see below), whose sum is σ = 805443264000. Its totient is φ = 71594955264.

The previous prime is 266243742733. The next prime is 266243742797. The reversal of 266243742744 is 447247342662.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 46608444 + ... + 46614155.

It is an arithmetic number, because the mean of its divisors is an integer number (12585051000).

Almost surely, 2^266243742744 is an apocalyptic number.

266243742744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

266243742744 is an abundant number, since it is smaller than the sum of its proper divisors (539199521256).

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

266243742744 is a wasteful number, since it uses less digits than its factorization.

266243742744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93222632 (or 93222628 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 51.

The spelling of 266243742744 in words is "two hundred sixty-six billion, two hundred forty-three million, seven hundred forty-two thousand, seven hundred forty-four".