665177221467352 has 64 divisors (see below), whose sum is σ = 1381073020588800. Its totient is φ = 297802599219840.

The previous prime is 665177221467271. The next prime is 665177221467383. The reversal of 665177221467352 is 253764122771566.

It is a super-3 number, since 3×665177221467352³ (a number of 45 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 15 ways as a sum of consecutive naturals, for example, 39118149 + ... + 53484427.

It is an arithmetic number, because the mean of its divisors is an integer number (21579265946700).

Almost surely, 2^{665177221467352} 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 665177221467352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (690536510294400).

665177221467352 is an abundant number, since it is smaller than the sum of its proper divisors (715895799121448).

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

665177221467352 is a wasteful number, since it uses less digits than its factorization.

665177221467352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14374216 (or 14374212 counting only the distinct ones).

The product of its digits is 177811200, while the sum is 64.

The spelling of 665177221467352 in words is "six hundred sixty-five trillion, one hundred seventy-seven billion, two hundred twenty-one million, four hundred sixty-seven thousand, three hundred fifty-two".