665128132152 has 48 divisors (see below), whose sum is σ = 1827728139720. Its totient is φ = 201553978560.

The previous prime is 665128132139. The next prime is 665128132153. The reversal of 665128132152 is 251231821566.

It is a super-2 number, since 2×665128132152² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665128132153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114516403 + ... + 114522210.

Almost surely, 2^665128132152 is an apocalyptic number.

It is an amenable number.

665128132152 is an abundant number, since it is smaller than the sum of its proper divisors (1162600007568).

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

665128132152 is a wasteful number, since it uses less digits than its factorization.

665128132152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229038644 (or 229038629 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The spelling of 665128132152 in words is "six hundred sixty-five billion, one hundred twenty-eight million, one hundred thirty-two thousand, one hundred fifty-two".