660706511 has 2 divisors, whose sum is σ = 660706512. Its totient is φ = 660706510.

The previous prime is 660706493. The next prime is 660706517. The reversal of 660706511 is 115607066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 660706511 - 2¹⁴ = 660690127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660706517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330353255 + 330353256.

It is an arithmetic number, because the mean of its divisors is an integer number (330353256).

Almost surely, 2^660706511 is an apocalyptic number.

660706511 is a deficient number, since it is larger than the sum of its proper divisors (1).

660706511 is an equidigital number, since it uses as much as digits as its factorization.

660706511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 660706511 is about 25704.2119311213. The cubic root of 660706511 is about 870.9693300442.

The spelling of 660706511 in words is "six hundred sixty million, seven hundred six thousand, five hundred eleven".