331666113666 has 32 divisors (see below), whose sum is σ = 681415213248. Its totient is φ = 107542900800.

The previous prime is 331666113641. The next prime is 331666113673. The reversal of 331666113666 is 666311666133.

It is a super-2 number, since 2×331666113666² (a number of 24 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 820296 + ... + 1155948.

It is an arithmetic number, because the mean of its divisors is an integer number (21294225414).

Almost surely, 2^331666113666 is an apocalyptic number.

331666113666 is an abundant number, since it is smaller than the sum of its proper divisors (349749099582).

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

331666113666 is a wasteful number, since it uses less digits than its factorization.

331666113666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340146.

The product of its digits is 1259712, while the sum is 48.

Adding to 331666113666 its reverse (666311666133), we get a palindrome (997977779799).

The spelling of 331666113666 in words is "three hundred thirty-one billion, six hundred sixty-six million, one hundred thirteen thousand, six hundred sixty-six".