165663161580 has 96 divisors (see below), whose sum is σ = 530176098816. Its totient is φ = 37862009856.

The previous prime is 165663161549. The next prime is 165663161641. The reversal of 165663161580 is 85161366561.

165663161580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 7173412 + ... + 7196468.

It is an arithmetic number, because the mean of its divisors is an integer number (5522667696).

Almost surely, 2^165663161580 is an apocalyptic number.

165663161580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165663161580 is an abundant number, since it is smaller than the sum of its proper divisors (364512937236).

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

165663161580 is a wasteful number, since it uses less digits than its factorization.

165663161580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40183 (or 40181 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 165663161580 in words is "one hundred sixty-five billion, six hundred sixty-three million, one hundred sixty-one thousand, five hundred eighty".