266782223380 has 24 divisors (see below), whose sum is σ = 562567337640. Its totient is φ = 106270095360.

The previous prime is 266782223243. The next prime is 266782223381. The reversal of 266782223380 is 83322287662.

It can be written as a sum of positive squares in 4 ways, for example, as 8102160144 + 258680063236 = 90012^2 + 508606^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266782223381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27669685 + ... + 27679324.

It is an arithmetic number, because the mean of its divisors is an integer number (23440305735).

Almost surely, 2^266782223380 is an apocalyptic number.

266782223380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266782223380 is an abundant number, since it is smaller than the sum of its proper divisors (295785114260).

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

266782223380 is a wasteful number, since it uses less digits than its factorization.

266782223380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55349259 (or 55349257 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 49.

The spelling of 266782223380 in words is "two hundred sixty-six billion, seven hundred eighty-two million, two hundred twenty-three thousand, three hundred eighty".