1663117672 has 16 divisors (see below), whose sum is σ = 3253926240. Its totient is φ = 795404016.

The previous prime is 1663117669. The next prime is 1663117679. The reversal of 1663117672 is 2767113661.

It is not an unprimeable number, because it can be changed into a prime (1663117679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4519158 + ... + 4519525.

It is an arithmetic number, because the mean of its divisors is an integer number (203370390).

Almost surely, 2^1663117672 is an apocalyptic number.

It is an amenable number.

1663117672 is a deficient number, since it is larger than the sum of its proper divisors (1590808568).

1663117672 is a wasteful number, since it uses less digits than its factorization.

1663117672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9038712 (or 9038708 counting only the distinct ones).

The product of its digits is 63504, while the sum is 40.

The square root of 1663117672 is about 40781.3397523917. The cubic root of 1663117672 is about 1184.7889437597.

The spelling of 1663117672 in words is "one billion, six hundred sixty-three million, one hundred seventeen thousand, six hundred seventy-two".