266612721100 has 72 divisors (see below), whose sum is σ = 643053560688. Its totient is φ = 95120812800.

The previous prime is 266612721073. The next prime is 266612721107. The reversal of 266612721100 is 1127216662.

It is not an unprimeable number, because it can be changed into a prime (266612721107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2228259 + ... + 2344858.

It is an arithmetic number, because the mean of its divisors is an integer number (8931299454).

Almost surely, 2^266612721100 is an apocalyptic number.

266612721100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266612721100 is an abundant number, since it is smaller than the sum of its proper divisors (376440839588).

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

266612721100 is a wasteful number, since it uses less digits than its factorization.

266612721100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573195 (or 4573188 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

Adding to 266612721100 its reverse (1127216662), we get a palindrome (267739937762).

The spelling of 266612721100 in words is "two hundred sixty-six billion, six hundred twelve million, seven hundred twenty-one thousand, one hundred".