665150672 has 20 divisors (see below), whose sum is σ = 1289133636. Its totient is φ = 332471040.

The previous prime is 665150659. The next prime is 665150701. The reversal of 665150672 is 276051566.

It can be written as a sum of positive squares in 2 ways, for example, as 604373056 + 60777616 = 24584^2 + 7796^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85172 + ... + 92652.

Almost surely, 2^665150672 is an apocalyptic number.

It is an amenable number.

665150672 is a deficient number, since it is larger than the sum of its proper divisors (623982964).

665150672 is a wasteful number, since it uses less digits than its factorization.

665150672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13046 (or 13040 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 665150672 is about 25790.5151557700. The cubic root of 665150672 is about 872.9177905142.

The spelling of 665150672 in words is "six hundred sixty-five million, one hundred fifty thousand, six hundred seventy-two".