1663701573 has 16 divisors (see below), whose sum is σ = 2318823936. Its totient is φ = 1059028080.

The previous prime is 1663701569. The next prime is 1663701577. The reversal of 1663701573 is 3751073661.

It is an interprime number because it is at equal distance from previous prime (1663701569) and next prime (1663701577).

It is not a de Polignac number, because 1663701573 - 2² = 1663701569 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663701577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18286 + ... + 60512.

It is an arithmetic number, because the mean of its divisors is an integer number (144926496).

Almost surely, 2^1663701573 is an apocalyptic number.

It is an amenable number.

1663701573 is a deficient number, since it is larger than the sum of its proper divisors (655122363).

1663701573 is a wasteful number, since it uses less digits than its factorization.

1663701573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42824.

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 1663701573 is about 40788.4980478566. The cubic root of 1663701573 is about 1184.9275826778.

The spelling of 1663701573 in words is "one billion, six hundred sixty-three million, seven hundred one thousand, five hundred seventy-three".