66678579360 has 144 divisors (see below), whose sum is σ = 228407122944. Its totient is φ = 17713245696.

The previous prime is 66678579343. The next prime is 66678579389. The reversal of 66678579360 is 6397587666.

It is a tau number, because it is divible by the number of its divisors (144).

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, 290689 + ... + 466751.

It is an arithmetic number, because the mean of its divisors is an integer number (1586160576).

Almost surely, 2^66678579360 is an apocalyptic number.

66678579360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66678579360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114203561472).

66678579360 is an abundant number, since it is smaller than the sum of its proper divisors (161728543584).

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

66678579360 is a wasteful number, since it uses less digits than its factorization.

66678579360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176347 (or 176336 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 63.

The spelling of 66678579360 in words is "sixty-six billion, six hundred seventy-eight million, five hundred seventy-nine thousand, three hundred sixty".