340660665 has 24 divisors (see below), whose sum is σ = 606440328. Its totient is φ = 176774400.

The previous prime is 340660597. The next prime is 340660687. The reversal of 340660665 is 566066043.

340660665 is a `hidden beast` number, since 3 + 40 + 6 + 606 + 6 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 129481641 + 211179024 = 11379^2 + 14532^2 .

It is not a de Polignac number, because 340660665 - 2⁸ = 340660409 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100636 + ... + 103965.

It is an arithmetic number, because the mean of its divisors is an integer number (25268347).

Almost surely, 2^340660665 is an apocalyptic number.

It is an amenable number.

340660665 is a deficient number, since it is larger than the sum of its proper divisors (265779663).

340660665 is a wasteful number, since it uses less digits than its factorization.

340660665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204649 (or 204646 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 340660665 is about 18456.9950154406. The cubic root of 340660665 is about 698.4049840124.

The spelling of 340660665 in words is "three hundred forty million, six hundred sixty thousand, six hundred sixty-five".