212065081668 has 120 divisors (see below), whose sum is σ = 616189654080. Its totient is φ = 63049596480.

The previous prime is 212065081663. The next prime is 212065081681. The reversal of 212065081668 is 866180560212.

212065081668 is a `hidden beast` number, since 2 + 120 + 6 + 508 + 16 + 6 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (212065081663) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 372448 + ... + 750231.

It is an arithmetic number, because the mean of its divisors is an integer number (5134913784).

Almost surely, 2^212065081668 is an apocalyptic number.

It is an amenable number.

212065081668 is an abundant number, since it is smaller than the sum of its proper divisors (404124572412).

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

212065081668 is a wasteful number, since it uses less digits than its factorization.

212065081668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122759 (or 1122748 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 212065081668 in words is "two hundred twelve billion, sixty-five million, eighty-one thousand, six hundred sixty-eight".