665004156752 has 80 divisors (see below), whose sum is σ = 1433901557760. Its totient is φ = 296695526400.

The previous prime is 665004156731. The next prime is 665004156847. The reversal of 665004156752 is 257651400566.

It is a junction number, because it is equal to n+sod(n) for n = 665004156697 and 665004156706.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5817524 + ... + 5930732.

It is an arithmetic number, because the mean of its divisors is an integer number (17923769472).

Almost surely, 2^665004156752 is an apocalyptic number.

665004156752 is a gapful number since it is divisible by the number (62) 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 665004156752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (716950778880).

665004156752 is an abundant number, since it is smaller than the sum of its proper divisors (768897401008).

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

665004156752 is a wasteful number, since it uses less digits than its factorization.

665004156752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114172 (or 114166 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 47.

The spelling of 665004156752 in words is "six hundred sixty-five billion, four million, one hundred fifty-six thousand, seven hundred fifty-two".