10660781 has 2 divisors, whose sum is σ = 10660782. Its totient is φ = 10660780.

The previous prime is 10660763. The next prime is 10660789. The reversal of 10660781 is 18706601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7107556 + 3553225 = 2666^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 10660781 - 2¹⁰ = 10659757 is a prime.

It is a super-2 number, since 2×10660781² = 227304503059922, which contains 22 as substring.

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 (10660789) 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, 5330390 + 5330391.

It is an arithmetic number, because the mean of its divisors is an integer number (5330391).

Almost surely, 2^10660781 is an apocalyptic number.

It is an amenable number.

10660781 is a deficient number, since it is larger than the sum of its proper divisors (1).

10660781 is an equidigital number, since it uses as much as digits as its factorization.

10660781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 10660781 is about 3265.0851443722. The cubic root of 10660781 is about 220.0879882207.

The spelling of 10660781 in words is "ten million, six hundred sixty thousand, seven hundred eighty-one".