331666021612 has 12 divisors (see below), whose sum is σ = 587408496696. Its totient is φ = 163835022560.

The previous prime is 331666021591. The next prime is 331666021649. The reversal of 331666021612 is 216120666133.

It is a super-2 number, since 2×331666021612² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499496689 + ... + 499497352.

It is an arithmetic number, because the mean of its divisors is an integer number (48950708058).

Almost surely, 2^331666021612 is an apocalyptic number.

It is an amenable number.

331666021612 is a deficient number, since it is larger than the sum of its proper divisors (255742475084).

331666021612 is a wasteful number, since it uses less digits than its factorization.

331666021612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998994128 (or 998994126 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

Adding to 331666021612 its reverse (216120666133), we get a palindrome (547786687745).

The spelling of 331666021612 in words is "three hundred thirty-one billion, six hundred sixty-six million, twenty-one thousand, six hundred twelve".