1663434073 has 8 divisors (see below), whose sum is σ = 1903161600. Its totient is φ = 1424230080.

The previous prime is 1663434041. The next prime is 1663434077. The reversal of 1663434073 is 3704343661.

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

It is not a de Polignac number, because 1663434073 - 2⁵ = 1663434041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1663434077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124048 + ... + 136801.

It is an arithmetic number, because the mean of its divisors is an integer number (237895200).

Almost surely, 2^1663434073 is an apocalyptic number.

It is an amenable number.

1663434073 is a deficient number, since it is larger than the sum of its proper divisors (239727527).

1663434073 is an equidigital number, since it uses as much as digits as its factorization.

1663434073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261767.

The product of its (nonzero) digits is 108864, while the sum is 37.

The square root of 1663434073 is about 40785.2188053466. The cubic root of 1663434073 is about 1184.8640726663.

The spelling of 1663434073 in words is "one billion, six hundred sixty-three million, four hundred thirty-four thousand, seventy-three".