656798 has 8 divisors (see below), whose sum is σ = 990792. Its totient is φ = 326536.

The previous prime is 656791. The next prime is 656809. The reversal of 656798 is 897656.

It is a happy number.

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

It is a super-2 number, since 2×656798² = 862767225608, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656791) 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, 440 + ... + 1227.

It is an arithmetic number, because the mean of its divisors is an integer number (123849).

2⁶⁵⁶⁷⁹⁸ is an apocalyptic number.

656798 is a deficient number, since it is larger than the sum of its proper divisors (333994).

656798 is a wasteful number, since it uses less digits than its factorization.

656798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866.

The product of its digits is 90720, while the sum is 41.

The square root of 656798 is about 810.4307496634. The cubic root of 656798 is about 86.9248481238.

The spelling of 656798 in words is "six hundred fifty-six thousand, seven hundred ninety-eight".