340666505 has 4 divisors (see below), whose sum is σ = 408799812. Its totient is φ = 272533200.

The previous prime is 340666477. The next prime is 340666549. The reversal of 340666505 is 505666043.

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

It can be written as a sum of positive squares in 2 ways, for example, as 64176121 + 276490384 = 8011^2 + 16628^2 .

It is not a de Polignac number, because 340666505 - 2¹² = 340662409 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 34066646 + ... + 34066655.

It is an arithmetic number, because the mean of its divisors is an integer number (102199953).

Almost surely, 2^340666505 is an apocalyptic number.

It is an amenable number.

340666505 is a deficient number, since it is larger than the sum of its proper divisors (68133307).

340666505 is an equidigital number, since it uses as much as digits as its factorization.

340666505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68133306.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 340666505 is about 18457.1532203642. The cubic root of 340666505 is about 698.4089749455.

The spelling of 340666505 in words is "three hundred forty million, six hundred sixty-six thousand, five hundred five".