168642006 has 64 divisors (see below), whose sum is σ = 389188800. Its totient is φ = 48254976.

The previous prime is 168641999. The next prime is 168642013. The reversal of 168642006 is 600246861.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (168641999) and next prime (168642013).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117300 + ... + 118728.

It is an arithmetic number, because the mean of its divisors is an integer number (6081075).

Almost surely, 2^168642006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168642006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194594400).

168642006 is an abundant number, since it is smaller than the sum of its proper divisors (220546794).

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

168642006 is a wasteful number, since it uses less digits than its factorization.

168642006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 168642006 is about 12986.2237005220. The cubic root of 168642006 is about 552.4868171817.

Adding to 168642006 its reverse (600246861), we get a palindrome (768888867).

The spelling of 168642006 in words is "one hundred sixty-eight million, six hundred forty-two thousand, six".