665046946 has 16 divisors (see below), whose sum is σ = 1004902200. Its totient is φ = 330085888.

The previous prime is 665046883. The next prime is 665046947. The reversal of 665046946 is 649640566.

It can be written as a sum of positive squares in 4 ways, for example, as 411887025 + 253159921 = 20295^2 + 15911^2 .

It is a junction number, because it is equal to n+sod(n) for n = 665046896 and 665046905.

It is not an unprimeable number, because it can be changed into a prime (665046947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320400 + ... + 322468.

Almost surely, 2^665046946 is an apocalyptic number.

665046946 is a deficient number, since it is larger than the sum of its proper divisors (339855254).

665046946 is a wasteful number, since it uses less digits than its factorization.

665046946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173.

The product of its (nonzero) digits is 933120, while the sum is 46.

The square root of 665046946 is about 25788.5041442888. The cubic root of 665046946 is about 872.8724128368.

The spelling of 665046946 in words is "six hundred sixty-five million, forty-six thousand, nine hundred forty-six".