1664412017 has 2 divisors, whose sum is σ = 1664412018. Its totient is φ = 1664412016.

The previous prime is 1664411981. The next prime is 1664412059. The reversal of 1664412017 is 7102144661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1420083856 + 244328161 = 37684^2 + 15631^2 .

It is a cyclic number.

It is not a de Polignac number, because 1664412017 - 2¹⁴ = 1664395633 is a prime.

It is not a weakly prime, because it can be changed into another prime (1664412077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832206008 + 832206009.

It is an arithmetic number, because the mean of its divisors is an integer number (832206009).

Almost surely, 2^1664412017 is an apocalyptic number.

It is an amenable number.

1664412017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664412017 is an equidigital number, since it uses as much as digits as its factorization.

1664412017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1664412017 is about 40797.2059950188. The cubic root of 1664412017 is about 1185.0962236782.

Adding to 1664412017 its reverse (7102144661), we get a palindrome (8766556678).

The spelling of 1664412017 in words is "one billion, six hundred sixty-four million, four hundred twelve thousand, seventeen".