664104206 has 4 divisors (see below), whose sum is σ = 996156312. Its totient is φ = 332052102.

The previous prime is 664104197. The next prime is 664104223. The reversal of 664104206 is 602401466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 602401466 = 2 ⋅301200733.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166026050 + ... + 166026053.

It is an arithmetic number, because the mean of its divisors is an integer number (249039078).

Almost surely, 2^664104206 is an apocalyptic number.

664104206 is a deficient number, since it is larger than the sum of its proper divisors (332052106).

664104206 is a wasteful number, since it uses less digits than its factorization.

664104206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332052105.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 664104206 is about 25770.2193626674. The cubic root of 664104206 is about 872.4597698492.

The spelling of 664104206 in words is "six hundred sixty-four million, one hundred four thousand, two hundred six".