663665141 has 4 divisors (see below), whose sum is σ = 663730284. Its totient is φ = 663600000.

The previous prime is 663665137. The next prime is 663665201. The reversal of 663665141 is 141566366.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 54612100 + 609053041 = 7390^2 + 24679^2 .

It is a cyclic number.

It is not a de Polignac number, because 663665141 - 2² = 663665137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663665095 and 663665104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663662141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13610 + ... + 38891.

It is an arithmetic number, because the mean of its divisors is an integer number (165932571).

Almost surely, 2^663665141 is an apocalyptic number.

It is an amenable number.

663665141 is a deficient number, since it is larger than the sum of its proper divisors (65143).

663665141 is a wasteful number, since it uses less digits than its factorization.

663665141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65142.

The product of its digits is 77760, while the sum is 38.

The square root of 663665141 is about 25761.6991093367. The cubic root of 663665141 is about 872.2674551509.

The spelling of 663665141 in words is "six hundred sixty-three million, six hundred sixty-five thousand, one hundred forty-one".