663660552 has 32 divisors (see below), whose sum is σ = 1756749600. Its totient is φ = 208207104.

The previous prime is 663660551. The next prime is 663660577. The reversal of 663660552 is 255066366.

It is a self number, because there is not a number n which added to its sum of digits gives 663660552.

It is not an unprimeable number, because it can be changed into a prime (663660551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812902 + ... + 813717.

It is an arithmetic number, because the mean of its divisors is an integer number (54898425).

Almost surely, 2^663660552 is an apocalyptic number.

It is an amenable number.

663660552 is an abundant number, since it is smaller than the sum of its proper divisors (1093089048).

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

663660552 is a wasteful number, since it uses less digits than its factorization.

663660552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626645 (or 1626641 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

The square root of 663660552 is about 25761.6100428525. The cubic root of 663660552 is about 872.2654446769.

The spelling of 663660552 in words is "six hundred sixty-three million, six hundred sixty thousand, five hundred fifty-two".