1664360407 has 2 divisors, whose sum is σ = 1664360408. Its totient is φ = 1664360406.

The previous prime is 1664360393. The next prime is 1664360413. The reversal of 1664360407 is 7040634661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1664360407 - 2¹¹ = 1664358359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664360207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832180203 + 832180204.

It is an arithmetic number, because the mean of its divisors is an integer number (832180204).

Almost surely, 2^1664360407 is an apocalyptic number.

1664360407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664360407 is an equidigital number, since it uses as much as digits as its factorization.

1664360407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 1664360407 is about 40796.5734713101. The cubic root of 1664360407 is about 1185.0839744178.

The spelling of 1664360407 in words is "one billion, six hundred sixty-four million, three hundred sixty thousand, four hundred seven".