65666106 has 64 divisors (see below), whose sum is σ = 160220160. Its totient is φ = 19770480.

The previous prime is 65666101. The next prime is 65666113. The reversal of 65666106 is 60166656.

It is not an unprimeable number, because it can be changed into a prime (65666101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134595 + ... + 135081.

It is an arithmetic number, because the mean of its divisors is an integer number (2503440).

Almost surely, 2^65666106 is an apocalyptic number.

65666106 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 65666106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80110080).

65666106 is an abundant number, since it is smaller than the sum of its proper divisors (94554054).

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

65666106 is a wasteful number, since it uses less digits than its factorization.

65666106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 65666106 is about 8103.4625932375. The cubic root of 65666106 is about 403.4413618303.

The spelling of 65666106 in words is "sixty-five million, six hundred sixty-six thousand, one hundred six".