340065661 has 8 divisors (see below), whose sum is σ = 366622200. Its totient is φ = 313565952.

The previous prime is 340065659. The next prime is 340065673. The reversal of 340065661 is 166560043.

It can be written as a sum of positive squares in 4 ways, for example, as 26988025 + 313077636 = 5195^2 + 17694^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 340065661 - 2¹ = 340065659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340065641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1336 + ... + 26113.

It is an arithmetic number, because the mean of its divisors is an integer number (45827775).

Almost surely, 2^340065661 is an apocalyptic number.

It is an amenable number.

340065661 is a deficient number, since it is larger than the sum of its proper divisors (26556539).

340065661 is a wasteful number, since it uses less digits than its factorization.

340065661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28415.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 340065661 is about 18440.8693124809. The cubic root of 340065661 is about 697.9981315101.

The spelling of 340065661 in words is "three hundred forty million, sixty-five thousand, six hundred sixty-one".