665127936000 has 1232 divisors, whose sum is σ = 2716443211248. Its totient is φ = 161243136000.

The previous prime is 665127935959. The next prime is 665127936041. The reversal of 665127936000 is 639721566.

665127936000 is a `hidden beast` number, since 6 + 6 + 512 + 79 + 3 + 60 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (665127935959) and next prime (665127936041).

It is a super-4 number, since 4×665127936000⁴ (a number of 48 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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 87 ways as a sum of consecutive naturals, for example, 60466175995 + ... + 60466176005.

Almost surely, 2^665127936000 is an apocalyptic number.

665127936000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665127936000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1358221605624).

665127936000 is an abundant number, since it is smaller than the sum of its proper divisors (2051315275248).

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

665127936000 is an frugal number, since it uses more digits than its factorization.

665127936000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 665127936000 in words is "six hundred sixty-five billion, one hundred twenty-seven million, nine hundred thirty-six thousand".