1664050919 has 2 divisors, whose sum is σ = 1664050920. Its totient is φ = 1664050918.

The previous prime is 1664050849. The next prime is 1664050961. The reversal of 1664050919 is 9190504661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1664050919 - 2¹² = 1664046823 is a prime.

It is a super-2 number, since 2×1664050919² = 5538130922049489122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664050019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832025459 + 832025460.

It is an arithmetic number, because the mean of its divisors is an integer number (832025460).

Almost surely, 2^1664050919 is an apocalyptic number.

1664050919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664050919 is an equidigital number, since it uses as much as digits as its factorization.

1664050919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 1664050919 is about 40792.7802313105. The cubic root of 1664050919 is about 1185.0105143660.

The spelling of 1664050919 in words is "one billion, six hundred sixty-four million, fifty thousand, nine hundred nineteen".