660604577 has 2 divisors, whose sum is σ = 660604578. Its totient is φ = 660604576.

The previous prime is 660604537. The next prime is 660604591. The reversal of 660604577 is 775406066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640899856 + 19704721 = 25316^2 + 4439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660604577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (660604537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330302288 + 330302289.

It is an arithmetic number, because the mean of its divisors is an integer number (330302289).

Almost surely, 2^660604577 is an apocalyptic number.

It is an amenable number.

660604577 is a deficient number, since it is larger than the sum of its proper divisors (1).

660604577 is an equidigital number, since it uses as much as digits as its factorization.

660604577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 660604577 is about 25702.2290278489. The cubic root of 660604577 is about 870.9245366034.

The spelling of 660604577 in words is "six hundred sixty million, six hundred four thousand, five hundred seventy-seven".