1664727367 has 2 divisors, whose sum is σ = 1664727368. Its totient is φ = 1664727366.

The previous prime is 1664727343. The next prime is 1664727377. The reversal of 1664727367 is 7637274661.

It is a strong prime.

It is an emirp because it is prime and its reverse (7637274661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1664727367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1664727367.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664727307) 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, 832363683 + 832363684.

It is an arithmetic number, because the mean of its divisors is an integer number (832363684).

Almost surely, 2^1664727367 is an apocalyptic number.

1664727367 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664727367 is an equidigital number, since it uses as much as digits as its factorization.

1664727367 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 49.

The square root of 1664727367 is about 40801.0706599717. The cubic root of 1664727367 is about 1185.1710642205.

The spelling of 1664727367 in words is "one billion, six hundred sixty-four million, seven hundred twenty-seven thousand, three hundred sixty-seven".