555664 has 10 divisors (see below), whose sum is σ = 1076630. Its totient is φ = 277824.

The previous prime is 555661. The next prime is 555671. The reversal of 555664 is 466555.

It can be written as a sum of positive squares in only one way, i.e., 313600 + 242064 = 560^2 + 492^2 .

It is not an unprimeable number, because it can be changed into a prime (555661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17349 + ... + 17380.

It is an arithmetic number, because the mean of its divisors is an integer number (107663).

2⁵⁵⁵⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

555664 is a deficient number, since it is larger than the sum of its proper divisors (520966).

555664 is a wasteful number, since it uses less digits than its factorization.

555664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34737 (or 34731 counting only the distinct ones).

The product of its digits is 18000, while the sum is 31.

The square root of 555664 is about 745.4287356951. The cubic root of 555664 is about 82.2124177363.

The spelling of 555664 in words is "five hundred fifty-five thousand, six hundred sixty-four".