663170740 has 12 divisors (see below), whose sum is σ = 1392658596. Its totient is φ = 265268288.

The previous prime is 663170713. The next prime is 663170741. The reversal of 663170740 is 47071366.

It can be written as a sum of positive squares in 2 ways, for example, as 336428964 + 326741776 = 18342^2 + 18076^2 .

It is a junction number, because it is equal to n+sod(n) for n = 663170696 and 663170705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663170741) 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, 16579249 + ... + 16579288.

It is an arithmetic number, because the mean of its divisors is an integer number (116054883).

Almost surely, 2^663170740 is an apocalyptic number.

It is an amenable number.

663170740 is an abundant number, since it is smaller than the sum of its proper divisors (729487856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663170740 is a wasteful number, since it uses less digits than its factorization.

663170740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33158546 (or 33158544 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 663170740 is about 25752.1016618062. The cubic root of 663170740 is about 872.0508011954.

The spelling of 663170740 in words is "six hundred sixty-three million, one hundred seventy thousand, seven hundred forty".