663604167 has 8 divisors (see below), whose sum is σ = 885034096. Its totient is φ = 442288512.

The previous prime is 663604141. The next prime is 663604189. The reversal of 663604167 is 761406366.

It is a happy number.

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

It is not a de Polignac number, because 663604167 - 2⁶ = 663604103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663604867) 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, 13948 + ... + 39009.

It is an arithmetic number, because the mean of its divisors is an integer number (110629262).

Almost surely, 2^663604167 is an apocalyptic number.

663604167 is a deficient number, since it is larger than the sum of its proper divisors (221429929).

663604167 is a wasteful number, since it uses less digits than its factorization.

663604167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57137.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 663604167 is about 25760.5156586587. The cubic root of 663604167 is about 872.2407412449.

The spelling of 663604167 in words is "six hundred sixty-three million, six hundred four thousand, one hundred sixty-seven".