266438326900 has 36 divisors (see below), whose sum is σ = 583287753132. Its totient is φ = 105632181760.

The previous prime is 266438326883. The next prime is 266438326907. The reversal of 266438326900 is 9623834662.

It can be written as a sum of positive squares in 6 ways, for example, as 22674938724 + 243763388176 = 150582^2 + 493724^2 .

It is a super-2 number, since 2×266438326900² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266438326907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11778007 + ... + 11800606.

It is an arithmetic number, because the mean of its divisors is an integer number (16202437587).

Almost surely, 2^266438326900 is an apocalyptic number.

266438326900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266438326900 is an abundant number, since it is smaller than the sum of its proper divisors (316849426232).

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

266438326900 is a wasteful number, since it uses less digits than its factorization.

266438326900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23578740 (or 23578733 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 49.

The spelling of 266438326900 in words is "two hundred sixty-six billion, four hundred thirty-eight million, three hundred twenty-six thousand, nine hundred".