655658 has 4 divisors (see below), whose sum is σ = 983490. Its totient is φ = 327828.

The previous prime is 655657. The next prime is 655687. The reversal of 655658 is 856556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 635209 + 20449 = 797^2 + 143^2 .

It is not an unprimeable number, because it can be changed into a prime (655651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163913 + ... + 163916.

2⁶⁵⁵⁶⁵⁸ is an apocalyptic number.

655658 is a deficient number, since it is larger than the sum of its proper divisors (327832).

655658 is a wasteful number, since it uses less digits than its factorization.

655658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327831.

The product of its digits is 36000, while the sum is 35.

The square root of 655658 is about 809.7271145269. The cubic root of 655658 is about 86.8745273683.

The spelling of 655658 in words is "six hundred fifty-five thousand, six hundred fifty-eight".