66220110 has 48 divisors (see below), whose sum is σ = 187827120. Its totient is φ = 16053120.

The previous prime is 66220109. The next prime is 66220153. The reversal of 66220110 is 1102266.

It is a happy number.

66220110 is a `hidden beast` number, since 662 + 2 + 0 + 1 + 1 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32455 + ... + 34434.

It is an arithmetic number, because the mean of its divisors is an integer number (3913065).

Almost surely, 2^66220110 is an apocalyptic number.

66220110 is an abundant number, since it is smaller than the sum of its proper divisors (121607010).

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

66220110 is a wasteful number, since it uses less digits than its factorization.

66220110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66913 (or 66910 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 66220110 is about 8137.5739627975. The cubic root of 66220110 is about 404.5727547502.

Adding to 66220110 its reverse (1102266), we get a palindrome (67322376).

The spelling of 66220110 in words is "sixty-six million, two hundred twenty thousand, one hundred ten".