665514181332 has 432 divisors, whose sum is σ = 2305766736000. Its totient is φ = 159097720320.

The previous prime is 665514181331. The next prime is 665514181337. The reversal of 665514181332 is 233181415566.

665514181332 is a `hidden beast` number, since 66 + 551 + 4 + 1 + 8 + 1 + 3 + 32 = 666.

It is a super-3 number, since 3×665514181332³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665514181331) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 90554794 + ... + 90562142.

It is an arithmetic number, because the mean of its divisors is an integer number (5337423000).

Almost surely, 2^665514181332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665514181332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1152883368000).

665514181332 is an abundant number, since it is smaller than the sum of its proper divisors (1640252554668).

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

665514181332 is a wasteful number, since it uses less digits than its factorization.

665514181332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7756 (or 7744 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

Adding to 665514181332 its reverse (233181415566), we get a palindrome (898695596898).

The spelling of 665514181332 in words is "six hundred sixty-five billion, five hundred fourteen million, one hundred eighty-one thousand, three hundred thirty-two".