1663424665 has 8 divisors (see below), whose sum is σ = 2281268160. Its totient is φ = 1140634032.

The previous prime is 1663424641. The next prime is 1663424671. The reversal of 1663424665 is 5664243661.

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

It is a cyclic number.

It is not a de Polignac number, because 1663424665 - 2⁹ = 1663424153 is a prime.

It is a super-2 number, since 2×1663424665² = 5533963232260724450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23763175 + ... + 23763244.

It is an arithmetic number, because the mean of its divisors is an integer number (285158520).

Almost surely, 2^1663424665 is an apocalyptic number.

It is an amenable number.

1663424665 is a deficient number, since it is larger than the sum of its proper divisors (617843495).

1663424665 is an equidigital number, since it uses as much as digits as its factorization.

1663424665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47526431.

The product of its digits is 622080, while the sum is 43.

The square root of 1663424665 is about 40785.1034692815. The cubic root of 1663424665 is about 1184.8618388893.

The spelling of 1663424665 in words is "one billion, six hundred sixty-three million, four hundred twenty-four thousand, six hundred sixty-five".