66060511651584 has 216 divisors, whose sum is σ = 191443483863632. Its totient is φ = 21907746570240.

The previous prime is 66060511651489. The next prime is 66060511651591. The reversal of 66060511651584 is 48515611506066.

It is a happy number.

66060511651584 is a `hidden beast` number, since 6 + 6 + 0 + 6 + 0 + 5 + 1 + 1 + 6 + 51 + 584 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 66060511651584.

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 23 ways as a sum of consecutive naturals, for example, 382578132 + ... + 382750764.

Almost surely, 2^{66060511651584} is an apocalyptic number.

66060511651584 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66060511651584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95721741931816).

66060511651584 is an abundant number, since it is smaller than the sum of its proper divisors (125382972212048).

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

66060511651584 is a wasteful number, since it uses less digits than its factorization.

66060511651584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173503 (or 173486 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 54.

The spelling of 66060511651584 in words is "sixty-six trillion, sixty billion, five hundred eleven million, six hundred fifty-one thousand, five hundred eighty-four".