665485066 has 16 divisors (see below), whose sum is σ = 1020033000. Its totient is φ = 325510848.

The previous prime is 665485033. The next prime is 665485133. The reversal of 665485066 is 660584566.

It can be written as a sum of positive squares in 4 ways, for example, as 665382025 + 103041 = 25795^2 + 321^2 .

It is an unprimeable number.

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, 28000 + ... + 45988.

Almost surely, 2^665485066 is an apocalyptic number.

665485066 is a deficient number, since it is larger than the sum of its proper divisors (354547934).

665485066 is a wasteful number, since it uses less digits than its factorization.

665485066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18393.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The square root of 665485066 is about 25796.9972283597. The cubic root of 665485066 is about 873.0640478870.

The spelling of 665485066 in words is "six hundred sixty-five million, four hundred eighty-five thousand, sixty-six".