66003136678080 has 336 divisors, whose sum is σ = 259532971326720. Its totient is φ = 15081908373504.

The previous prime is 66003136678057. The next prime is 66003136678117. The reversal of 66003136678080 is 8087663130066.

It is a tau number, because it is divible by the number of its divisors (336).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66986431 + ... + 67964609.

It is an arithmetic number, because the mean of its divisors is an integer number (772419557520).

Almost surely, 2^{66003136678080} is an apocalyptic number.

66003136678080 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 66003136678080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129766485663360).

66003136678080 is an abundant number, since it is smaller than the sum of its proper divisors (193529834648640).

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

66003136678080 is a wasteful number, since it uses less digits than its factorization.

66003136678080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981556 (or 981543 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 66003136678080 in words is "sixty-six trillion, three billion, one hundred thirty-six million, six hundred seventy-eight thousand, eighty".