665434850052 has 192 divisors, whose sum is σ = 1809340968960. Its totient is φ = 186432897024.

The previous prime is 665434850039. The next prime is 665434850089. The reversal of 665434850052 is 250058434566.

It is a junction number, because it is equal to n+sod(n) for n = 665434849983 and 665434850010.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 702676243 + ... + 702677189.

It is an arithmetic number, because the mean of its divisors is an integer number (9423650880).

Almost surely, 2^665434850052 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 665434850052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (904670484480).

665434850052 is an abundant number, since it is smaller than the sum of its proper divisors (1143906118908).

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

665434850052 is a wasteful number, since it uses less digits than its factorization.

665434850052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730 (or 1728 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 48.

The spelling of 665434850052 in words is "six hundred sixty-five billion, four hundred thirty-four million, eight hundred fifty thousand, fifty-two".