665142208 has 14 divisors (see below), whose sum is σ = 1319891696. Its totient is φ = 332571072.

The previous prime is 665142199. The next prime is 665142211. The reversal of 665142208 is 802241566.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 5196360 + ... + 5196487.

Almost surely, 2^665142208 is an apocalyptic number.

It is an amenable number.

665142208 is a deficient number, since it is larger than the sum of its proper divisors (654749488).

665142208 is a wasteful number, since it uses less digits than its factorization.

665142208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10392859 (or 10392849 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 665142208 is about 25790.3510639154. The cubic root of 665142208 is about 872.9140878907.

The spelling of 665142208 in words is "six hundred sixty-five million, one hundred forty-two thousand, two hundred eight".