66882601680 has 120 divisors (see below), whose sum is σ = 214240814496. Its totient is φ = 17259966720.

The previous prime is 66882601657. The next prime is 66882601691. The reversal of 66882601680 is 8610628866.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

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, 85647 + ... + 375633.

Almost surely, 2^66882601680 is an apocalyptic number.

66882601680 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 66882601680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107120407248).

66882601680 is an abundant number, since it is smaller than the sum of its proper divisors (147358212816).

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

66882601680 is a wasteful number, since it uses less digits than its factorization.

66882601680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290065 (or 290028 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 66882601680 in words is "sixty-six billion, eight hundred eighty-two million, six hundred one thousand, six hundred eighty".