66409067587512 has 192 divisors, whose sum is σ = 180078870142080. Its totient is φ = 20399165369856.

The previous prime is 66409067587493. The next prime is 66409067587543. The reversal of 66409067587512 is 21578576090466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8441469003 + ... + 8441476869.

It is an arithmetic number, because the mean of its divisors is an integer number (937910781990).

Almost surely, 2^{66409067587512} 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 66409067587512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90039435071040).

66409067587512 is an abundant number, since it is smaller than the sum of its proper divisors (113669802554568).

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

66409067587512 is a wasteful number, since it uses less digits than its factorization.

66409067587512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11142 (or 11125 counting only the distinct ones).

The product of its (nonzero) digits is 152409600, while the sum is 66.

The spelling of 66409067587512 in words is "sixty-six trillion, four hundred nine billion, sixty-seven million, five hundred eighty-seven thousand, five hundred twelve".