339655661 has 2 divisors, whose sum is σ = 339655662. Its totient is φ = 339655660.

The previous prime is 339655649. The next prime is 339655691. The reversal of 339655661 is 166556933.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325261225 + 14394436 = 18035^2 + 3794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-339655661 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (339655601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169827830 + 169827831.

It is an arithmetic number, because the mean of its divisors is an integer number (169827831).

Almost surely, 2^339655661 is an apocalyptic number.

It is an amenable number.

339655661 is a deficient number, since it is larger than the sum of its proper divisors (1).

339655661 is an equidigital number, since it uses as much as digits as its factorization.

339655661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 437400, while the sum is 44.

The square root of 339655661 is about 18429.7493471832. The cubic root of 339655661 is about 697.7175049973.

It can be divided in two parts, 33 and 9655661, that multiplied together give a palindrome (318636813).

The spelling of 339655661 in words is "three hundred thirty-nine million, six hundred fifty-five thousand, six hundred sixty-one".