663170657 has 4 divisors (see below), whose sum is σ = 665262996. Its totient is φ = 661078320.

The previous prime is 663170603. The next prime is 663170659. The reversal of 663170657 is 756071366.

663170657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 78304801 + 584865856 = 8849^2 + 24184^2 .

It is a cyclic number.

It is not a de Polignac number, because 663170657 - 2¹² = 663166561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663170659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1045694 + ... + 1046327.

It is an arithmetic number, because the mean of its divisors is an integer number (166315749).

Almost surely, 2^663170657 is an apocalyptic number.

It is an amenable number.

663170657 is a deficient number, since it is larger than the sum of its proper divisors (2092339).

663170657 is a wasteful number, since it uses less digits than its factorization.

663170657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092338.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 663170657 is about 25752.1000502872. The cubic root of 663170657 is about 872.0507648146.

The spelling of 663170657 in words is "six hundred sixty-three million, one hundred seventy thousand, six hundred fifty-seven".