66609824487552 has 192 divisors, whose sum is σ = 210468544322400. Its totient is φ = 20897199673344.

The previous prime is 66609824487541. The next prime is 66609824487571. The reversal of 66609824487552 is 25578442890666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62457102 + ... + 63514637.

Almost surely, 2^{66609824487552} is an apocalyptic number.

It is an amenable number.

66609824487552 is an abundant number, since it is smaller than the sum of its proper divisors (143858719834848).

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

66609824487552 is a wasteful number, since it uses less digits than its factorization.

66609824487552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125971785 (or 125971761 counting only the distinct ones).

The product of its (nonzero) digits is 1393459200, while the sum is 72.

The spelling of 66609824487552 in words is "sixty-six trillion, six hundred nine billion, eight hundred twenty-four million, four hundred eighty-seven thousand, five hundred fifty-two".