755659661 has 2 divisors, whose sum is σ = 755659662. Its totient is φ = 755659660.

The previous prime is 755659657. The next prime is 755659691. The reversal of 755659661 is 166956557.

755659661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 742562500 + 13097161 = 27250^2 + 3619^2 .

It is a cyclic number.

It is not a de Polignac number, because 755659661 - 2² = 755659657 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (755659691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 377829830 + 377829831.

It is an arithmetic number, because the mean of its divisors is an integer number (377829831).

Almost surely, 2^755659661 is an apocalyptic number.

It is an amenable number.

755659661 is a deficient number, since it is larger than the sum of its proper divisors (1).

755659661 is an equidigital number, since it uses as much as digits as its factorization.

755659661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1701000, while the sum is 50.

The square root of 755659661 is about 27489.2644681519. The cubic root of 755659661 is about 910.8399687086.

The spelling of 755659661 in words is "seven hundred fifty-five million, six hundred fifty-nine thousand, six hundred sixty-one".