66417732108 has 288 divisors, whose sum is σ = 215247352320. Its totient is φ = 17339961600.

The previous prime is 66417732079. The next prime is 66417732113. The reversal of 66417732108 is 80123771466.

66417732108 is a `hidden beast` number, since 66 + 417 + 73 + 2 + 108 = 666.

It is a super-2 number, since 2×66417732108² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12901591 + ... + 12906737.

It is an arithmetic number, because the mean of its divisors is an integer number (747386640).

Almost surely, 2^66417732108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66417732108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107623676160).

66417732108 is an abundant number, since it is smaller than the sum of its proper divisors (148829620212).

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

66417732108 is a wasteful number, since it uses less digits than its factorization.

66417732108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5294 (or 5273 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 66417732108 in words is "sixty-six billion, four hundred seventeen million, seven hundred thirty-two thousand, one hundred eight".