1664548323 has 4 divisors (see below), whose sum is σ = 2219397768. Its totient is φ = 1109698880.

The previous prime is 1664548321. The next prime is 1664548331. The reversal of 1664548323 is 3238454661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1664548323 - 2¹ = 1664548321 is a prime.

It is a super-2 number, since 2×1664548323² = 5541442239204224658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1664548321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277424718 + ... + 277424723.

It is an arithmetic number, because the mean of its divisors is an integer number (554849442).

Almost surely, 2^1664548323 is an apocalyptic number.

1664548323 is a deficient number, since it is larger than the sum of its proper divisors (554849445).

1664548323 is an equidigital number, since it uses as much as digits as its factorization.

1664548323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554849444.

The product of its digits is 414720, while the sum is 42.

The square root of 1664548323 is about 40798.8764918839. The cubic root of 1664548323 is about 1185.1285737042.

The spelling of 1664548323 in words is "one billion, six hundred sixty-four million, five hundred forty-eight thousand, three hundred twenty-three".