66210220312 has 32 divisors (see below), whose sum is σ = 124721175600. Its totient is φ = 32951470464.

The previous prime is 66210220301. The next prime is 66210220337. The reversal of 66210220312 is 21302201266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2402998 + ... + 2430394.

Almost surely, 2^66210220312 is an apocalyptic number.

It is an amenable number.

66210220312 is a deficient number, since it is larger than the sum of its proper divisors (58510955288).

66210220312 is a wasteful number, since it uses less digits than its factorization.

66210220312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28795 (or 28791 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 66210220312 its reverse (21302201266), we get a palindrome (87512421578).

The spelling of 66210220312 in words is "sixty-six billion, two hundred ten million, two hundred twenty thousand, three hundred twelve".