1660312212 has 24 divisors (see below), whose sum is σ = 4172066976. Its totient is φ = 510865248.

The previous prime is 1660312189. The next prime is 1660312223. The reversal of 1660312212 is 2122130661.

It is a super-3 number, since 3×1660312212³ (a number of 29 digits) contains 333 as substring.

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, 5321358 + ... + 5321669.

It is an arithmetic number, because the mean of its divisors is an integer number (173836124).

Almost surely, 2^1660312212 is an apocalyptic number.

1660312212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1660312212 is an abundant number, since it is smaller than the sum of its proper divisors (2511754764).

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

1660312212 is a wasteful number, since it uses less digits than its factorization.

1660312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10643047 (or 10643045 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1660312212 is about 40746.9288658667. The cubic root of 1660312212 is about 1184.1223746245.

Adding to 1660312212 its reverse (2122130661), we get a palindrome (3782442873).

The spelling of 1660312212 in words is "one billion, six hundred sixty million, three hundred twelve thousand, two hundred twelve".