1664533459 has 2 divisors, whose sum is σ = 1664533460. Its totient is φ = 1664533458.

The previous prime is 1664533421. The next prime is 1664533477. The reversal of 1664533459 is 9543354661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1664533459 - 2⁷ = 1664533331 is a prime.

It is a super-2 number, since 2×1664533459² = 5541343272261009362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1664530459) 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, 832266729 + 832266730.

It is an arithmetic number, because the mean of its divisors is an integer number (832266730).

Almost surely, 2^1664533459 is an apocalyptic number.

1664533459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664533459 is an equidigital number, since it uses as much as digits as its factorization.

1664533459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 46.

The square root of 1664533459 is about 40798.6943295983. The cubic root of 1664533459 is about 1185.1250460599.

The spelling of 1664533459 in words is "one billion, six hundred sixty-four million, five hundred thirty-three thousand, four hundred fifty-nine".