66701889288 has 128 divisors (see below), whose sum is σ = 201326592000. Its totient is φ = 20384239680.

The previous prime is 66701889277. The next prime is 66701889403. The reversal of 66701889288 is 88298810766.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134920 + ... + 389367.

It is an arithmetic number, because the mean of its divisors is an integer number (1572864000).

Almost surely, 2^66701889288 is an apocalyptic number.

It is an amenable number.

66701889288 is an abundant number, since it is smaller than the sum of its proper divisors (134624702712).

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

66701889288 is a wasteful number, since it uses less digits than its factorization.

66701889288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524352 (or 524342 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 63.

The spelling of 66701889288 in words is "sixty-six billion, seven hundred one million, eight hundred eighty-nine thousand, two hundred eighty-eight".