66654451500 has 192 divisors, whose sum is σ = 238890043392. Its totient is φ = 14063328000.

The previous prime is 66654451481. The next prime is 66654451511. The reversal of 66654451500 is 515445666.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 63 ways as a sum of consecutive naturals, for example, 107656 + ... + 380655.

It is an arithmetic number, because the mean of its divisors is an integer number (1244218976).

Almost surely, 2^66654451500 is an apocalyptic number.

66654451500 is a gapful number since it is divisible by the number (60) 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 66654451500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119445021696).

66654451500 is an abundant number, since it is smaller than the sum of its proper divisors (172235591892).

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

66654451500 is a wasteful number, since it uses less digits than its factorization.

66654451500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488353 (or 488341 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 66654451500 in words is "sixty-six billion, six hundred fifty-four million, four hundred fifty-one thousand, five hundred".