663116601 has 16 divisors (see below), whose sum is σ = 1012276224. Its totient is φ = 378243984.

The previous prime is 663116593. The next prime is 663116617. The reversal of 663116601 is 106611366.

It is not a de Polignac number, because 663116601 - 2³ = 663116593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663116681) 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, 16221 + ... + 39866.

It is an arithmetic number, because the mean of its divisors is an integer number (63267264).

Almost surely, 2^663116601 is an apocalyptic number.

It is an amenable number.

663116601 is a deficient number, since it is larger than the sum of its proper divisors (349159623).

663116601 is a wasteful number, since it uses less digits than its factorization.

663116601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56660.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 663116601 is about 25751.0504834269. The cubic root of 663116601 is about 872.0270701308.

Adding to 663116601 its reverse (106611366), we get a palindrome (769727967).

It can be divided in two parts, 6631 and 16601, that added together give a palindrome (23232).

The spelling of 663116601 in words is "six hundred sixty-three million, one hundred sixteen thousand, six hundred one".