665609346 has 32 divisors (see below), whose sum is σ = 1480248000. Its totient is φ = 221702400.

The previous prime is 665609327. The next prime is 665609377. The reversal of 665609346 is 643906566.

665609346 is a `hidden beast` number, since 6 + 6 + 5 + 609 + 34 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82605 + ... + 90303.

It is an arithmetic number, because the mean of its divisors is an integer number (46257750).

Almost surely, 2^665609346 is an apocalyptic number.

665609346 is an abundant number, since it is smaller than the sum of its proper divisors (814638654).

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

665609346 is a wasteful number, since it uses less digits than its factorization.

665609346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9311 (or 9305 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The square root of 665609346 is about 25799.4059233929. The cubic root of 665609346 is about 873.1183930315.

The spelling of 665609346 in words is "six hundred sixty-five million, six hundred nine thousand, three hundred forty-six".