663979041 has 24 divisors (see below), whose sum is σ = 1082352960. Its totient is φ = 388533600.

The previous prime is 663979031. The next prime is 663979079. The reversal of 663979041 is 140979366.

663979041 is a `hidden beast` number, since 6 + 639 + 7 + 9 + 0 + 4 + 1 = 666.

It is not a de Polignac number, because 663979041 - 2⁵ = 663979009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663979021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112765 + ... + 118506.

It is an arithmetic number, because the mean of its divisors is an integer number (45098040).

Almost surely, 2^663979041 is an apocalyptic number.

It is an amenable number.

663979041 is a deficient number, since it is larger than the sum of its proper divisors (418373919).

663979041 is a wasteful number, since it uses less digits than its factorization.

663979041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231317 (or 231314 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 663979041 is about 25767.7907667693. The cubic root of 663979041 is about 872.4049550137.

The spelling of 663979041 in words is "six hundred sixty-three million, nine hundred seventy-nine thousand, forty-one".