66713533632 has 140 divisors (see below), whose sum is σ = 204139653696. Its totient is φ = 21520442880.

The previous prime is 66713533583. The next prime is 66713533643. The reversal of 66713533632 is 23633531766.

66713533632 is a `hidden beast` number, since 6 + 6 + 7 + 1 + 3 + 5 + 3 + 3 + 632 = 666.

It is a super-2 number, since 2×66713533632² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 19 ways as a sum of consecutive naturals, for example, 46863 + ... + 368270.

Almost surely, 2^66713533632 is an apocalyptic number.

66713533632 is a gapful number since it is divisible by the number (62) 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 66713533632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102069826848).

66713533632 is an abundant number, since it is smaller than the sum of its proper divisors (137426120064).

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

66713533632 is a wasteful number, since it uses less digits than its factorization.

66713533632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415188 (or 415169 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 45.

The spelling of 66713533632 in words is "sixty-six billion, seven hundred thirteen million, five hundred thirty-three thousand, six hundred thirty-two".