664163204 has 24 divisors (see below), whose sum is σ = 1192275840. Its totient is φ = 323575776.

The previous prime is 664163167. The next prime is 664163207. The reversal of 664163204 is 402361466.

It is a super-2 number, since 2×664163204² = 882225523095091232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664163207) 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, 35339 + ... + 50765.

It is an arithmetic number, because the mean of its divisors is an integer number (49678160).

Almost surely, 2^664163204 is an apocalyptic number.

It is an amenable number.

664163204 is a deficient number, since it is larger than the sum of its proper divisors (528112636).

664163204 is a wasteful number, since it uses less digits than its factorization.

664163204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15707 (or 15705 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 664163204 is about 25771.3640306446. The cubic root of 664163204 is about 872.4856050805.

The spelling of 664163204 in words is "six hundred sixty-four million, one hundred sixty-three thousand, two hundred four".