66408787392 has 112 divisors (see below), whose sum is σ = 177696022560. Its totient is φ = 21886599168.

The previous prime is 66408787373. The next prime is 66408787421. The reversal of 66408787392 is 29378780466.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 9390834 + ... + 9397902.

It is an arithmetic number, because the mean of its divisors is an integer number (1586571630).

Almost surely, 2^66408787392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66408787392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88848011280).

66408787392 is an abundant number, since it is smaller than the sum of its proper divisors (111287235168).

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

66408787392 is a wasteful number, since it uses less digits than its factorization.

66408787392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7630 (or 7620 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 60.

The spelling of 66408787392 in words is "sixty-six billion, four hundred eight million, seven hundred eighty-seven thousand, three hundred ninety-two".