26661162100 has 18 divisors (see below), whose sum is σ = 57854721974. Its totient is φ = 10664464800.

The previous prime is 26661162079. The next prime is 26661162119. The reversal of 26661162100 is 126116662.

It can be written as a sum of positive squares in 3 ways, for example, as 142993764 + 26518168336 = 11958^2 + 162844^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133305711 + ... + 133305910.

Almost surely, 2^26661162100 is an apocalyptic number.

26661162100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26661162100 is an abundant number, since it is smaller than the sum of its proper divisors (31193559874).

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

26661162100 is a wasteful number, since it uses less digits than its factorization.

26661162100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266611635 (or 266611628 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

Adding to 26661162100 its reverse (126116662), we get a palindrome (26787278762).

The spelling of 26661162100 in words is "twenty-six billion, six hundred sixty-one million, one hundred sixty-two thousand, one hundred".