656598 has 8 divisors (see below), whose sum is σ = 1313208. Its totient is φ = 218864.

The previous prime is 656597. The next prime is 656599. The reversal of 656598 is 895656.

It is an interprime number because it is at equal distance from previous prime (656597) and next prime (656599).

It is a sphenic number, since it is the product of 3 distinct primes.

656598 is an admirable number.

It is a super-2 number, since 2×656598² = 862241867208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54711 + ... + 54722.

It is an arithmetic number, because the mean of its divisors is an integer number (164151).

2⁶⁵⁶⁵⁹⁸ is an apocalyptic number.

656598 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

656598 is a wasteful number, since it uses less digits than its factorization.

656598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109438.

The product of its digits is 64800, while the sum is 39.

The square root of 656598 is about 810.3073490966. The cubic root of 656598 is about 86.9160241350.

The spelling of 656598 in words is "six hundred fifty-six thousand, five hundred ninety-eight".