66678158592 has 432 divisors, whose sum is σ = 213511334400. Its totient is φ = 19926466560.

The previous prime is 66678158549. The next prime is 66678158629. The reversal of 66678158592 is 29585187666.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 67283217 + ... + 67284207.

It is an arithmetic number, because the mean of its divisors is an integer number (494239200).

Almost surely, 2^66678158592 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 66678158592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106755667200).

66678158592 is an abundant number, since it is smaller than the sum of its proper divisors (146833175808).

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

66678158592 is a wasteful number, since it uses less digits than its factorization.

66678158592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114 (or 1097 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The spelling of 66678158592 in words is "sixty-six billion, six hundred seventy-eight million, one hundred fifty-eight thousand, five hundred ninety-two".