1663891675064 has 32 divisors (see below), whose sum is σ = 3372753406800. Its totient is φ = 766857611520.

The previous prime is 1663891675063. The next prime is 1663891675073. The reversal of 1663891675064 is 4605761983661.

It is a junction number, because it is equal to n+sod(n) for n = 1663891674988 and 1663891675006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663891675063) 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, 147922157 + ... + 147933404.

Almost surely, 2^{1663891675064} is an apocalyptic number.

It is an amenable number.

1663891675064 is an abundant number, since it is smaller than the sum of its proper divisors (1708861731736).

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

1663891675064 is a wasteful number, since it uses less digits than its factorization.

1663891675064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295855623 (or 295855619 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 62.

The spelling of 1663891675064 in words is "one trillion, six hundred sixty-three billion, eight hundred ninety-one million, six hundred seventy-five thousand, sixty-four".