66566202120 has 192 divisors, whose sum is σ = 244146052800. Its totient is φ = 15580776960.

The previous prime is 66566202103. The next prime is 66566202127. The reversal of 66566202120 is 2120266566.

66566202120 is a `hidden beast` number, since 6 + 6 + 5 + 6 + 620 + 2 + 1 + 20 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (66566202127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 174982 + ... + 404661.

It is an arithmetic number, because the mean of its divisors is an integer number (1271594025).

Almost surely, 2^66566202120 is an apocalyptic number.

66566202120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66566202120 is an abundant number, since it is smaller than the sum of its proper divisors (177579850680).

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

66566202120 is a wasteful number, since it uses less digits than its factorization.

66566202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579700 (or 579693 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 66566202120 its reverse (2120266566), we get a palindrome (68686468686).

The spelling of 66566202120 in words is "sixty-six billion, five hundred sixty-six million, two hundred two thousand, one hundred twenty".