665010706 has 4 divisors (see below), whose sum is σ = 997516062. Its totient is φ = 332505352.

The previous prime is 665010701. The next prime is 665010721. The reversal of 665010706 is 607010566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 647244481 + 17766225 = 25441^2 + 4215^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (665010701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166252675 + ... + 166252678.

Almost surely, 2^665010706 is an apocalyptic number.

665010706 is a deficient number, since it is larger than the sum of its proper divisors (332505356).

665010706 is a wasteful number, since it uses less digits than its factorization.

665010706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332505355.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 665010706 is about 25787.8014960562. The cubic root of 665010706 is about 872.8565575798.

The spelling of 665010706 in words is "six hundred sixty-five million, ten thousand, seven hundred six".