66110732213800 has 24 divisors (see below), whose sum is σ = 153707452397550. Its totient is φ = 26444292885440.

The previous prime is 66110732213789. The next prime is 66110732213873. The reversal of 66110732213800 is 831223701166.

It can be written as a sum of positive squares in 3 ways, for example, as 25761735662404 + 40348996551396 = 5075602^2 + 6352086^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 165276830335 + ... + 165276830734.

Almost surely, 2^{66110732213800} is an apocalyptic number.

It is an amenable number.

66110732213800 is an abundant number, since it is smaller than the sum of its proper divisors (87596720183750).

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

66110732213800 is a wasteful number, since it uses less digits than its factorization.

66110732213800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330553661085 (or 330553661076 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

Adding to 66110732213800 its reverse (831223701166), we get a palindrome (66941955914966).

The spelling of 66110732213800 in words is "sixty-six trillion, one hundred ten billion, seven hundred thirty-two million, two hundred thirteen thousand, eight hundred".