1664360207 has 2 divisors, whose sum is σ = 1664360208. Its totient is φ = 1664360206.

The previous prime is 1664360189. The next prime is 1664360221. The reversal of 1664360207 is 7020634661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1664360207 - 2⁶ = 1664360143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664360227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832180103 + 832180104.

It is an arithmetic number, because the mean of its divisors is an integer number (832180104).

Almost surely, 2^1664360207 is an apocalyptic number.

1664360207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664360207 is an equidigital number, since it uses as much as digits as its factorization.

1664360207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 1664360207 is about 40796.5710201237. The cubic root of 1664360207 is about 1185.0839269488.

Adding to 1664360207 its reverse (7020634661), we get a palindrome (8684994868).

The spelling of 1664360207 in words is "one billion, six hundred sixty-four million, three hundred sixty thousand, two hundred seven".