266779442460 has 96 divisors (see below), whose sum is σ = 792024791040. Its totient is φ = 66863100928.

The previous prime is 266779442459. The next prime is 266779442467. The reversal of 266779442460 is 64244977662.

It is a self number, because there is not a number n which added to its sum of digits gives 266779442460.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266779442467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 551497 + ... + 915263.

It is an arithmetic number, because the mean of its divisors is an integer number (8250258240).

Almost surely, 2^266779442460 is an apocalyptic number.

266779442460 is a gapful number since it is divisible by the number (20) 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 266779442460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396012395520).

266779442460 is an abundant number, since it is smaller than the sum of its proper divisors (525245348580).

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

266779442460 is a wasteful number, since it uses less digits than its factorization.

266779442460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364515 (or 364513 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 57.

The spelling of 266779442460 in words is "two hundred sixty-six billion, seven hundred seventy-nine million, four hundred forty-two thousand, four hundred sixty".