66612672000 has 640 divisors, whose sum is σ = 281283425280. Its totient is φ = 15222988800.

The previous prime is 66612671999. The next prime is 66612672011. The reversal of 66612672000 is 27621666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12093247 + ... + 12098753.

It is an arithmetic number, because the mean of its divisors is an integer number (439505352).

Almost surely, 2^66612672000 is an apocalyptic number.

66612672000 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 66612672000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140641712640).

66612672000 is an abundant number, since it is smaller than the sum of its proper divisors (214670753280).

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

66612672000 is an equidigital number, since it uses as much as digits as its factorization.

66612672000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5556 (or 5524 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 66612672000 in words is "sixty-six billion, six hundred twelve million, six hundred seventy-two thousand".