1663370020 has 48 divisors (see below), whose sum is σ = 3832783920. Its totient is φ = 602574336.

The previous prime is 1663370017. The next prime is 1663370077. The reversal of 1663370020 is 200733661.

It can be written as a sum of positive squares in 8 ways, for example, as 118722816 + 1544647204 = 10896^2 + 39302^2 .

It is an unprimeable number.

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, 46575 + ... + 74134.

It is an arithmetic number, because the mean of its divisors is an integer number (79849665).

Almost surely, 2^1663370020 is an apocalyptic number.

1663370020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1663370020 is an abundant number, since it is smaller than the sum of its proper divisors (2169413900).

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

1663370020 is a wasteful number, since it uses less digits than its factorization.

1663370020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120784 (or 120782 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 1663370020 is about 40784.4335500691. The cubic root of 1663370020 is about 1184.8488641540.

The spelling of 1663370020 in words is "one billion, six hundred sixty-three million, three hundred seventy thousand, twenty".