1660461217 has 2 divisors, whose sum is σ = 1660461218. Its totient is φ = 1660461216.

The previous prime is 1660461197. The next prime is 1660461293. The reversal of 1660461217 is 7121640661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 990738576 + 669722641 = 31476^2 + 25879^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660461217 - 2²⁷ = 1526243489 is a prime.

It is a super-2 number, since 2×1660461217² = 5514262906322242178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1660464217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830230608 + 830230609.

It is an arithmetic number, because the mean of its divisors is an integer number (830230609).

Almost surely, 2^1660461217 is an apocalyptic number.

It is an amenable number.

1660461217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660461217 is an equidigital number, since it uses as much as digits as its factorization.

1660461217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1660461217 is about 40748.7572448535. The cubic root of 1660461217 is about 1184.1577966524.

The spelling of 1660461217 in words is "one billion, six hundred sixty million, four hundred sixty-one thousand, two hundred seventeen".