66606666833100 has 72 divisors (see below), whose sum is σ = 193252101073920. Its totient is φ = 17712302089280.

The previous prime is 66606666833059. The next prime is 66606666833219. The reversal of 66606666833100 is 133866660666.

66606666833100 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66606666833100² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 309115452 + ... + 309330851.

It is an arithmetic number, because the mean of its divisors is an integer number (2684056959360).

Almost surely, 2^{66606666833100} is an apocalyptic number.

66606666833100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66606666833100 is an abundant number, since it is smaller than the sum of its proper divisors (126645434240820).

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

66606666833100 is a wasteful number, since it uses less digits than its factorization.

66606666833100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618446679 (or 618446672 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 57.

The spelling of 66606666833100 in words is "sixty-six trillion, six hundred six billion, six hundred sixty-six million, eight hundred thirty-three thousand, one hundred".