212665464660 has 96 divisors (see below), whose sum is σ = 656028180864. Its totient is φ = 51044800000.

The previous prime is 212665464631. The next prime is 212665464679. The reversal of 212665464660 is 66464566212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1528491 + ... + 1661810.

It is an arithmetic number, because the mean of its divisors is an integer number (6833626884).

Almost surely, 2^212665464660 is an apocalyptic number.

212665464660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212665464660 is an abundant number, since it is smaller than the sum of its proper divisors (443362716204).

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

212665464660 is a wasteful number, since it uses less digits than its factorization.

212665464660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190425 (or 3190423 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 48.

The spelling of 212665464660 in words is "two hundred twelve billion, six hundred sixty-five million, four hundred sixty-four thousand, six hundred sixty".