578666 has 16 divisors (see below), whose sum is σ = 980640. Its totient is φ = 253680.

The previous prime is 578659. The next prime is 578687. The reversal of 578666 is 666875.

578666 is a modest number, since divided by 666 gives 578 as remainder.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185 + ... + 1091.

It is an arithmetic number, because the mean of its divisors is an integer number (61290).

2⁵⁷⁸⁶⁶⁶ is an apocalyptic number.

578666 is a deficient number, since it is larger than the sum of its proper divisors (401974).

578666 is a wasteful number, since it uses less digits than its factorization.

578666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949.

The product of its digits is 60480, while the sum is 38.

The square root of 578666 is about 760.7009925063. The cubic root of 578666 is about 83.3315235163.

Subtracting 578666 from its reverse (666875), we obtain a square (88209 = 297²).

The spelling of 578666 in words is "five hundred seventy-eight thousand, six hundred sixty-six".