1663343620 has 48 divisors (see below), whose sum is σ = 3533644800. Its totient is φ = 657645696.

The previous prime is 1663343609. The next prime is 1663343629. The reversal of 1663343620 is 263433661.

1663343620 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1663343629) 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 15 ways as a sum of consecutive naturals, for example, 663289 + ... + 665791.

It is an arithmetic number, because the mean of its divisors is an integer number (73617600).

Almost surely, 2^1663343620 is an apocalyptic number.

1663343620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1663343620 is an abundant number, since it is smaller than the sum of its proper divisors (1870301180).

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

1663343620 is a wasteful number, since it uses less digits than its factorization.

1663343620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2884 (or 2882 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 34.

The square root of 1663343620 is about 40784.1098958896. The cubic root of 1663343620 is about 1184.8425957200.

The spelling of 1663343620 in words is "one billion, six hundred sixty-three million, three hundred forty-three thousand, six hundred twenty".