386666 has 16 divisors (see below), whose sum is σ = 673920. Its totient is φ = 162960.

The previous prime is 386651. The next prime is 386677. The reversal of 386666 is 666683.

It is an Ulam number.

386666 is a modest number, since divided by 666 gives 386 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 800 + ... + 1188.

It is an arithmetic number, because the mean of its divisors is an integer number (42120).

2³⁸⁶⁶⁶⁶ is an apocalyptic number.

386666 is a deficient number, since it is larger than the sum of its proper divisors (287254).

386666 is a wasteful number, since it uses less digits than its factorization.

386666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469.

The product of its digits is 31104, while the sum is 35.

The square root of 386666 is about 621.8247341494. The cubic root of 386666 is about 72.8526457743.

The spelling of 386666 in words is "three hundred eighty-six thousand, six hundred sixty-six".