66216630533100 has 144 divisors (see below), whose sum is σ = 196294314172320. Its totient is φ = 17224046643200.

The previous prime is 66216630533071. The next prime is 66216630533113. The reversal of 66216630533100 is 133503661266.

It is a super-2 number, since 2×66216630533100² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69551086 + ... + 70496714.

It is an arithmetic number, because the mean of its divisors is an integer number (1363154959530).

Almost surely, 2^{66216630533100} is an apocalyptic number.

66216630533100 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 66216630533100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98147157086160).

66216630533100 is an abundant number, since it is smaller than the sum of its proper divisors (130077683639220).

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

66216630533100 is a wasteful number, since it uses less digits than its factorization.

66216630533100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951380 (or 951373 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 42.

The spelling of 66216630533100 in words is "sixty-six trillion, two hundred sixteen billion, six hundred thirty million, five hundred thirty-three thousand, one hundred".