165606606000 has 800 divisors, whose sum is σ = 657247219200. Its totient is φ = 39859776000.

The previous prime is 165606605999. The next prime is 165606606007. The reversal of 165606606000 is 606606561.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (165606606007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 354617767 + ... + 354618233.

It is an arithmetic number, because the mean of its divisors is an integer number (821559024).

Almost surely, 2^165606606000 is an apocalyptic number.

165606606000 is a gapful number since it is divisible by the number (10) 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 165606606000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328623609600).

165606606000 is an abundant number, since it is smaller than the sum of its proper divisors (491640613200).

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

165606606000 is a wasteful number, since it uses less digits than its factorization.

165606606000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 165606606000 in words is "one hundred sixty-five billion, six hundred six million, six hundred six thousand".