660199597 has 16 divisors (see below), whose sum is σ = 687899520. Its totient is φ = 633169152.

The previous prime is 660199577. The next prime is 660199619. The reversal of 660199597 is 795991066.

It is not a de Polignac number, because 660199597 - 2⁷ = 660199469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660199537) 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 15 ways as a sum of consecutive naturals, for example, 638593 + ... + 639625.

It is an arithmetic number, because the mean of its divisors is an integer number (42993720).

Almost surely, 2^660199597 is an apocalyptic number.

It is an amenable number.

660199597 is a deficient number, since it is larger than the sum of its proper divisors (27699923).

660199597 is a wasteful number, since it uses less digits than its factorization.

660199597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332.

The product of its (nonzero) digits is 918540, while the sum is 52.

The square root of 660199597 is about 25694.3495150198. The cubic root of 660199597 is about 870.7465283916.

The spelling of 660199597 in words is "six hundred sixty million, one hundred ninety-nine thousand, five hundred ninety-seven".