66287601632 has 96 divisors (see below), whose sum is σ = 151408051200. Its totient is φ = 27979176960.

The previous prime is 66287601593. The next prime is 66287601647. The reversal of 66287601632 is 23610678266.

It is a super-2 number, since 2×66287601632² (a number of 22 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 21739244 + ... + 21742292.

It is an arithmetic number, because the mean of its divisors is an integer number (1577167200).

Almost surely, 2^66287601632 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 66287601632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75704025600).

66287601632 is an abundant number, since it is smaller than the sum of its proper divisors (85120449568).

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

66287601632 is a wasteful number, since it uses less digits than its factorization.

66287601632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504 (or 4496 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 66287601632 in words is "sixty-six billion, two hundred eighty-seven million, six hundred one thousand, six hundred thirty-two".