340566661 has 8 divisors (see below), whose sum is σ = 361888344. Its totient is φ = 319388160.

The previous prime is 340566649. The next prime is 340566683. The reversal of 340566661 is 166665043.

It can be written as a sum of positive squares in 4 ways, for example, as 245893761 + 94672900 = 15681^2 + 9730^2 .

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 340566661 - 2¹³ = 340558469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 340566661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340566601) 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 in 7 ways as a sum of consecutive naturals, for example, 30870 + ... + 40423.

It is an arithmetic number, because the mean of its divisors is an integer number (45236043).

Almost surely, 2^340566661 is an apocalyptic number.

It is an amenable number.

340566661 is a deficient number, since it is larger than the sum of its proper divisors (21321683).

340566661 is a wasteful number, since it uses less digits than its factorization.

340566661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71591.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 340566661 is about 18454.4482713518. The cubic root of 340566661 is about 698.3407373796.

The spelling of 340566661 in words is "three hundred forty million, five hundred sixty-six thousand, six hundred sixty-one".