66682449091290 has 256 divisors, whose sum is σ = 176136826060800. Its totient is φ = 16089005334528.

The previous prime is 66682449091289. The next prime is 66682449091361. The reversal of 66682449091290 is 9219094428666.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 766782831 + ... + 766869789.

It is an arithmetic number, because the mean of its divisors is an integer number (688034476800).

Almost surely, 2^{66682449091290} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66682449091290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88068413030400).

66682449091290 is an abundant number, since it is smaller than the sum of its proper divisors (109454376969510).

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

66682449091290 is a wasteful number, since it uses less digits than its factorization.

66682449091290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87581.

The product of its (nonzero) digits is 80621568, while the sum is 66.

The spelling of 66682449091290 in words is "sixty-six trillion, six hundred eighty-two billion, four hundred forty-nine million, ninety-one thousand, two hundred ninety".