66606301220 has 48 divisors (see below), whose sum is σ = 145979826048. Its totient is φ = 25479759360.

The previous prime is 66606301199. The next prime is 66606301271. The reversal of 66606301220 is 2210360666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4218140 + ... + 4233900.

It is an arithmetic number, because the mean of its divisors is an integer number (3041246376).

Almost surely, 2^66606301220 is an apocalyptic number.

It is an amenable number.

66606301220 is an abundant number, since it is smaller than the sum of its proper divisors (79373524828).

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

66606301220 is a wasteful number, since it uses less digits than its factorization.

66606301220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24980 (or 24978 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 66606301220 its reverse (2210360666), we get a palindrome (68816661886).

The spelling of 66606301220 in words is "sixty-six billion, six hundred six million, three hundred one thousand, two hundred twenty".