664786146 has 16 divisors (see below), whose sum is σ = 1332828000. Its totient is φ = 221052768.

The previous prime is 664786121. The next prime is 664786151. The reversal of 664786146 is 641687466.

It is a junction number, because it is equal to n+sod(n) for n = 664786095 and 664786104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132996 + ... + 137903.

It is an arithmetic number, because the mean of its divisors is an integer number (83301750).

Almost surely, 2^664786146 is an apocalyptic number.

664786146 is an abundant number, since it is smaller than the sum of its proper divisors (668041854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664786146 is a wasteful number, since it uses less digits than its factorization.

664786146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271313.

The product of its digits is 1161216, while the sum is 48.

The square root of 664786146 is about 25783.4471318325. The cubic root of 664786146 is about 872.7582981414.

The spelling of 664786146 in words is "six hundred sixty-four million, seven hundred eighty-six thousand, one hundred forty-six".