1663040668 has 48 divisors (see below), whose sum is σ = 3145734144. Its totient is φ = 767338880.

The previous prime is 1663040651. The next prime is 1663040669. The reversal of 1663040668 is 8660403661.

It is a self number, because there is not a number n which added to its sum of digits gives 1663040668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663040669) 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 15 ways as a sum of consecutive naturals, for example, 304296 + ... + 309712.

It is an arithmetic number, because the mean of its divisors is an integer number (65536128).

Almost surely, 2^1663040668 is an apocalyptic number.

It is an amenable number.

1663040668 is a deficient number, since it is larger than the sum of its proper divisors (1482693476).

1663040668 is a wasteful number, since it uses less digits than its factorization.

1663040668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5562 (or 5560 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 1663040668 is about 40780.3956331961. The cubic root of 1663040668 is about 1184.7706578425.

The spelling of 1663040668 in words is "one billion, six hundred sixty-three million, forty thousand, six hundred sixty-eight".