1663434664 has 16 divisors (see below), whose sum is σ = 3226490100. Its totient is φ = 803037312.

The previous prime is 1663434599. The next prime is 1663434677. The reversal of 1663434664 is 4664343661.

It can be written as a sum of positive squares in 2 ways, for example, as 1661214564 + 2220100 = 40758^2 + 1490^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1663434664.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3584757 + ... + 3585220.

Almost surely, 2^1663434664 is an apocalyptic number.

It is an amenable number.

1663434664 is a deficient number, since it is larger than the sum of its proper divisors (1563055436).

1663434664 is a wasteful number, since it uses less digits than its factorization.

1663434664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7170012 (or 7170008 counting only the distinct ones).

The product of its digits is 746496, while the sum is 43.

The square root of 1663434664 is about 40785.2260506179. The cubic root of 1663434664 is about 1184.8642129894.

The spelling of 1663434664 in words is "one billion, six hundred sixty-three million, four hundred thirty-four thousand, six hundred sixty-four".