1663608326 has 4 divisors (see below), whose sum is σ = 2495412492. Its totient is φ = 831804162.

The previous prime is 1663608263. The next prime is 1663608337. The reversal of 1663608326 is 6238063661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6238063661 = 7591 ⋅821771.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415902080 + ... + 415902083.

It is an arithmetic number, because the mean of its divisors is an integer number (623853123).

Almost surely, 2^1663608326 is an apocalyptic number.

1663608326 is a deficient number, since it is larger than the sum of its proper divisors (831804166).

1663608326 is an equidigital number, since it uses as much as digits as its factorization.

1663608326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831804165.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 1663608326 is about 40787.3549767572. The cubic root of 1663608326 is about 1184.9054446917.

The spelling of 1663608326 in words is "one billion, six hundred sixty-three million, six hundred eight thousand, three hundred twenty-six".