66619229004432 has 480 divisors, whose sum is σ = 216167266909440. Its totient is φ = 19597758935040.

The previous prime is 66619229004413. The next prime is 66619229004443. The reversal of 66619229004432 is 23440092291666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4098880018 + ... + 4098896270.

It is an arithmetic number, because the mean of its divisors is an integer number (450348472728).

Almost surely, 2^{66619229004432} 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 66619229004432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108083633454720).

66619229004432 is an abundant number, since it is smaller than the sum of its proper divisors (149548037905008).

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

66619229004432 is a wasteful number, since it uses less digits than its factorization.

66619229004432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18760 (or 18735 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 54.

The spelling of 66619229004432 in words is "sixty-six trillion, six hundred nineteen billion, two hundred twenty-nine million, four thousand, four hundred thirty-two".