66021496200 has 864 divisors, whose sum is σ = 257532475200. Its totient is φ = 15704409600.

The previous prime is 66021496199. The next prime is 66021496237. The reversal of 66021496200 is 269412066.

66021496200 is a `hidden beast` number, since 6 + 6 + 0 + 21 + 4 + 9 + 620 + 0 = 666.

It is a super-3 number, since 3×66021496200³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 605701746 + ... + 605701854.

Almost surely, 2^66021496200 is an apocalyptic number.

66021496200 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 66021496200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128766237600).

66021496200 is an abundant number, since it is smaller than the sum of its proper divisors (191510979000).

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

66021496200 is a wasteful number, since it uses less digits than its factorization.

66021496200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 66021496200 in words is "sixty-six billion, twenty-one million, four hundred ninety-six thousand, two hundred".