665152032020 has 96 divisors (see below), whose sum is σ = 1626847504128. Its totient is φ = 223699387392.

The previous prime is 665152032011. The next prime is 665152032037. The reversal of 665152032020 is 20230251566.

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 31 ways as a sum of consecutive naturals, for example, 50471672 + ... + 50484848.

It is an arithmetic number, because the mean of its divisors is an integer number (16946328168).

Almost surely, 2^665152032020 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 665152032020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (813423752064).

665152032020 is an abundant number, since it is smaller than the sum of its proper divisors (961695472108).

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

665152032020 is a wasteful number, since it uses less digits than its factorization.

665152032020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20049 (or 20047 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 665152032020 its reverse (20230251566), we get a palindrome (685382283586).

The spelling of 665152032020 in words is "six hundred sixty-five billion, one hundred fifty-two million, thirty-two thousand, twenty".