266940442496 has 256 divisors, whose sum is σ = 681067806720. Its totient is φ = 101374156800.

The previous prime is 266940442477. The next prime is 266940442511. The reversal of 266940442496 is 694244049662.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45855266 + ... + 45861086.

It is an arithmetic number, because the mean of its divisors is an integer number (2660421120).

Almost surely, 2^266940442496 is an apocalyptic number.

266940442496 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266940442496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340533903360).

266940442496 is an abundant number, since it is smaller than the sum of its proper divisors (414127364224).

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

266940442496 is a wasteful number, since it uses less digits than its factorization.

266940442496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6013 (or 6001 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 56.

The spelling of 266940442496 in words is "two hundred sixty-six billion, nine hundred forty million, four hundred forty-two thousand, four hundred ninety-six".