66808014672 has 160 divisors (see below), whose sum is σ = 208968125184. Its totient is φ = 17954611200.

The previous prime is 66808014671. The next prime is 66808014709. The reversal of 66808014672 is 27641080866.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66808014671) 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, 17482522 + ... + 17486342.

Almost surely, 2^66808014672 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 66808014672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104484062592).

66808014672 is an abundant number, since it is smaller than the sum of its proper divisors (142160110512).

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

66808014672 is a wasteful number, since it uses less digits than its factorization.

66808014672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6917 (or 6911 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 66808014672 in words is "sixty-six billion, eight hundred eight million, fourteen thousand, six hundred seventy-two".