275407661 has 2 divisors, whose sum is σ = 275407662. Its totient is φ = 275407660.

The previous prime is 275407637. The next prime is 275407723. The reversal of 275407661 is 166704572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246301636 + 29106025 = 15694^2 + 5395^2 .

It is a cyclic number.

It is not a de Polignac number, because 275407661 - 2⁶ = 275407597 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (275400661) by changing a digit.

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 as a sum of consecutive naturals, namely, 137703830 + 137703831.

It is an arithmetic number, because the mean of its divisors is an integer number (137703831).

Almost surely, 2^275407661 is an apocalyptic number.

It is an amenable number.

275407661 is a deficient number, since it is larger than the sum of its proper divisors (1).

275407661 is an equidigital number, since it uses as much as digits as its factorization.

275407661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 275407661 is about 16595.4108415550. The cubic root of 275407661 is about 650.6168983560.

The spelling of 275407661 in words is "two hundred seventy-five million, four hundred seven thousand, six hundred sixty-one".