1663641036 has 72 divisors (see below), whose sum is σ = 4245696000. Its totient is φ = 549251040.

The previous prime is 1663641017. The next prime is 1663641053. The reversal of 1663641036 is 6301463661.

1663641036 is a `hidden beast` number, since 1 + 6 + 6 + 3 + 641 + 0 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2777065 + ... + 2777663.

It is an arithmetic number, because the mean of its divisors is an integer number (58968000).

Almost surely, 2^1663641036 is an apocalyptic number.

It is an amenable number.

1663641036 is an abundant number, since it is smaller than the sum of its proper divisors (2582054964).

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

1663641036 is a wasteful number, since it uses less digits than its factorization.

1663641036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219 (or 1214 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 1663641036 is about 40787.7559569045. The cubic root of 1663641036 is about 1184.9132105427.

The spelling of 1663641036 in words is "one billion, six hundred sixty-three million, six hundred forty-one thousand, thirty-six".