668552598 has 24 divisors (see below), whose sum is σ = 1655463888. Its totient is φ = 191014992.

The previous prime is 668552597. The next prime is 668552611. The reversal of 668552598 is 895255866.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668552597) 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 11 ways as a sum of consecutive naturals, for example, 2652861 + ... + 2653112.

It is an arithmetic number, because the mean of its divisors is an integer number (68977662).

Almost surely, 2^668552598 is an apocalyptic number.

668552598 is an abundant number, since it is smaller than the sum of its proper divisors (986911290).

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

668552598 is a wasteful number, since it uses less digits than its factorization.

668552598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5305988 (or 5305985 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The square root of 668552598 is about 25856.3840859467. The cubic root of 668552598 is about 874.4034455661.

The spelling of 668552598 in words is "six hundred sixty-eight million, five hundred fifty-two thousand, five hundred ninety-eight".