660595398 has 32 divisors (see below), whose sum is σ = 1333449216. Its totient is φ = 218164128.

The previous prime is 660595391. The next prime is 660595421. The reversal of 660595398 is 893595066.

It is a self number, because there is not a number n which added to its sum of digits gives 660595398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660595391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 416515 + ... + 418097.

It is an arithmetic number, because the mean of its divisors is an integer number (41670288).

Almost surely, 2^660595398 is an apocalyptic number.

660595398 is an abundant number, since it is smaller than the sum of its proper divisors (672853818).

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

660595398 is a wasteful number, since it uses less digits than its factorization.

660595398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188.

The product of its (nonzero) digits is 1749600, while the sum is 51.

The square root of 660595398 is about 25702.0504629494. The cubic root of 660595398 is about 870.9205027968.

The spelling of 660595398 in words is "six hundred sixty million, five hundred ninety-five thousand, three hundred ninety-eight".