756652661 has 2 divisors, whose sum is σ = 756652662. Its totient is φ = 756652660.

The previous prime is 756652579. The next prime is 756652679. The reversal of 756652661 is 166256657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 603635761 + 153016900 = 24569^2 + 12370^2 .

It is a cyclic number.

It is not a de Polignac number, because 756652661 - 2¹⁸ = 756390517 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 (756652691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378326330 + 378326331.

It is an arithmetic number, because the mean of its divisors is an integer number (378326331).

Almost surely, 2^756652661 is an apocalyptic number.

It is an amenable number.

756652661 is a deficient number, since it is larger than the sum of its proper divisors (1).

756652661 is an equidigital number, since it uses as much as digits as its factorization.

756652661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 44.

The square root of 756652661 is about 27507.3201348296. The cubic root of 756652661 is about 911.2387673760.

The spelling of 756652661 in words is "seven hundred fifty-six million, six hundred fifty-two thousand, six hundred sixty-one".