1664052899 has 2 divisors, whose sum is σ = 1664052900. Its totient is φ = 1664052898.

The previous prime is 1664052869. The next prime is 1664052917. The reversal of 1664052899 is 9982504661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1664052899 is a prime.

It is not a weakly prime, because it can be changed into another prime (1664052839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832026449 + 832026450.

It is an arithmetic number, because the mean of its divisors is an integer number (832026450).

Almost surely, 2^1664052899 is an apocalyptic number.

1664052899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664052899 is an equidigital number, since it uses as much as digits as its factorization.

1664052899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 1664052899 is about 40792.8045003037. The cubic root of 1664052899 is about 1185.0109843677.

The spelling of 1664052899 in words is "one billion, six hundred sixty-four million, fifty-two thousand, eight hundred ninety-nine".