660770329 has 2 divisors, whose sum is σ = 660770330. Its totient is φ = 660770328.

The previous prime is 660770291. The next prime is 660770339. The reversal of 660770329 is 923077066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 330512400 + 330257929 = 18180^2 + 18173^2 .

It is a cyclic number.

It is not a de Polignac number, because 660770329 - 2²⁷ = 526552601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660770291 and 660770300.

It is not a weakly prime, because it can be changed into another prime (660770339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330385164 + 330385165.

It is an arithmetic number, because the mean of its divisors is an integer number (330385165).

Almost surely, 2^660770329 is an apocalyptic number.

It is an amenable number.

660770329 is a deficient number, since it is larger than the sum of its proper divisors (1).

660770329 is an equidigital number, since it uses as much as digits as its factorization.

660770329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 40.

The square root of 660770329 is about 25705.4532930271. The cubic root of 660770329 is about 870.9973716079.

The spelling of 660770329 in words is "six hundred sixty million, seven hundred seventy thousand, three hundred twenty-nine".