667522553572068 has 96 divisors (see below), whose sum is σ = 1614056156616960. Its totient is φ = 214462365411840.

The previous prime is 667522553572033. The next prime is 667522553572087. The reversal of 667522553572068 is 860275355225766.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 667522553571993 and 667522553572011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 921053730 + ... + 921778182.

It is an arithmetic number, because the mean of its divisors is an integer number (16813084964760).

Almost surely, 2^{667522553572068} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667522553572068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (807028078308480).

667522553572068 is an abundant number, since it is smaller than the sum of its proper divisors (946533603044892).

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

667522553572068 is a wasteful number, since it uses less digits than its factorization.

667522553572068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729077 (or 729075 counting only the distinct ones).

The product of its (nonzero) digits is 1270080000, while the sum is 69.

The spelling of 667522553572068 in words is "six hundred sixty-seven trillion, five hundred twenty-two billion, five hundred fifty-three million, five hundred seventy-two thousand, sixty-eight".