665616446 has 16 divisors (see below), whose sum is σ = 1090294128. Its totient is φ = 302246400.

The previous prime is 665616359. The next prime is 665616461. The reversal of 665616446 is 644616566.

It is a junction number, because it is equal to n+sod(n) for n = 665616397 and 665616406.

It is a congruent number.

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, 7646 + ... + 37278.

It is an arithmetic number, because the mean of its divisors is an integer number (68143383).

Almost surely, 2^665616446 is an apocalyptic number.

665616446 is a deficient number, since it is larger than the sum of its proper divisors (424677682).

665616446 is a wasteful number, since it uses less digits than its factorization.

665616446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30667.

The product of its digits is 622080, while the sum is 44.

The square root of 665616446 is about 25799.5435230936. The cubic root of 665616446 is about 873.1214975144.

The spelling of 665616446 in words is "six hundred sixty-five million, six hundred sixteen thousand, four hundred forty-six".