1663900672 has 44 divisors (see below), whose sum is σ = 3801360880. Its totient is φ = 713097216.

The previous prime is 1663900639. The next prime is 1663900673. The reversal of 1663900672 is 2760093661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663900673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108897 + ... + 123232.

Almost surely, 2^1663900672 is an apocalyptic number.

It is an amenable number.

1663900672 is an abundant number, since it is smaller than the sum of its proper divisors (2137460208).

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

1663900672 is an equidigital number, since it uses as much as digits as its factorization.

1663900672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232156 (or 232138 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 1663900672 is about 40790.9386016061. The cubic root of 1663900672 is about 1184.9748484635.

The spelling of 1663900672 in words is "one billion, six hundred sixty-three million, nine hundred thousand, six hundred seventy-two".