308666 has 4 divisors (see below), whose sum is σ = 463002. Its totient is φ = 154332.

The previous prime is 308663. The next prime is 308681. The reversal of 308666 is 666803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666803 = 383 ⋅1741.

It can be written as a sum of positive squares in only one way, i.e., 235225 + 73441 = 485^2 + 271^2 .

308666 is a modest number, since divided by 666 gives 308 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (308663) by changing a digit.

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 as a sum of consecutive naturals, namely, 77165 + ... + 77168.

2³⁰⁸⁶⁶⁶ is an apocalyptic number.

308666 is a deficient number, since it is larger than the sum of its proper divisors (154336).

308666 is a wasteful number, since it uses less digits than its factorization.

308666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154335.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 308666 is about 555.5771773570. The cubic root of 308666 is about 67.5817756039.

The spelling of 308666 in words is "three hundred eight thousand, six hundred sixty-six".