660604556827 has 2 divisors, whose sum is σ = 660604556828. Its totient is φ = 660604556826.

The previous prime is 660604556797. The next prime is 660604556837. The reversal of 660604556827 is 728655406066.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660604556827 is a prime.

It is a super-3 number, since 3×660604556827³ (a number of 36 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (660604556837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330302278413 + 330302278414.

It is an arithmetic number, because the mean of its divisors is an integer number (330302278414).

Almost surely, 2^660604556827 is an apocalyptic number.

660604556827 is a deficient number, since it is larger than the sum of its proper divisors (1).

660604556827 is an equidigital number, since it uses as much as digits as its factorization.

660604556827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14515200, while the sum is 55.

The spelling of 660604556827 in words is "six hundred sixty billion, six hundred four million, five hundred fifty-six thousand, eight hundred twenty-seven".