660541627 has 2 divisors, whose sum is σ = 660541628. Its totient is φ = 660541626.

The previous prime is 660541621. The next prime is 660541643. The reversal of 660541627 is 726145066.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660541627 - 2⁷ = 660541499 is a prime.

It is not a weakly prime, because it can be changed into another prime (660541621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330270813 + 330270814.

It is an arithmetic number, because the mean of its divisors is an integer number (330270814).

Almost surely, 2^660541627 is an apocalyptic number.

660541627 is a deficient number, since it is larger than the sum of its proper divisors (1).

660541627 is an equidigital number, since it uses as much as digits as its factorization.

660541627 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 660541627 is about 25701.0043967157. The cubic root of 660541627 is about 870.8968718233.

The spelling of 660541627 in words is "six hundred sixty million, five hundred forty-one thousand, six hundred twenty-seven".