1664174087 has 2 divisors, whose sum is σ = 1664174088. Its totient is φ = 1664174086.

The previous prime is 1664174063. The next prime is 1664174093. The reversal of 1664174087 is 7804714661.

It is a strong prime.

It is an emirp because it is prime and its reverse (7804714661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1664174087 - 2¹⁸ = 1663911943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664174587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832087043 + 832087044.

It is an arithmetic number, because the mean of its divisors is an integer number (832087044).

Almost surely, 2^1664174087 is an apocalyptic number.

1664174087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664174087 is an equidigital number, since it uses as much as digits as its factorization.

1664174087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 1664174087 is about 40794.2898822862. The cubic root of 1664174087 is about 1185.0397506056.

The spelling of 1664174087 in words is "one billion, six hundred sixty-four million, one hundred seventy-four thousand, eighty-seven".