668534034 has 64 divisors (see below), whose sum is σ = 1582202880. Its totient is φ = 184282560.

The previous prime is 668534023. The next prime is 668534039. The reversal of 668534034 is 430435866.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 668533983 and 668534001.

It is not an unprimeable number, because it can be changed into a prime (668534039) by changing a digit.

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, 602272 + ... + 603380.

It is an arithmetic number, because the mean of its divisors is an integer number (24721920).

Almost surely, 2^668534034 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668534034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (791101440).

668534034 is an abundant number, since it is smaller than the sum of its proper divisors (913668846).

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

668534034 is a wasteful number, since it uses less digits than its factorization.

668534034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615.

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 668534034 is about 25856.0251005447. The cubic root of 668534034 is about 874.3953521736.

The spelling of 668534034 in words is "six hundred sixty-eight million, five hundred thirty-four thousand, thirty-four".