1664465493 has 8 divisors (see below), whose sum is σ = 2336092000. Its totient is φ = 1051241328.

The previous prime is 1664465447. The next prime is 1664465503. The reversal of 1664465493 is 3945644661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1664465493 - 2⁹ = 1664464981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664465443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14600518 + ... + 14600631.

It is an arithmetic number, because the mean of its divisors is an integer number (292011500).

Almost surely, 2^1664465493 is an apocalyptic number.

It is an amenable number.

1664465493 is a deficient number, since it is larger than the sum of its proper divisors (671626507).

1664465493 is a wasteful number, since it uses less digits than its factorization.

1664465493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29201171.

The product of its digits is 1866240, while the sum is 48.

The square root of 1664465493 is about 40797.8613777732. The cubic root of 1664465493 is about 1185.1089155530.

The spelling of 1664465493 in words is "one billion, six hundred sixty-four million, four hundred sixty-five thousand, four hundred ninety-three".