1663351650 has 72 divisors (see below), whose sum is σ = 4589697684. Its totient is φ = 431568000.

The previous prime is 1663351619. The next prime is 1663351691. The reversal of 1663351650 is 561533661.

1663351650 is a `hidden beast` number, since 1 + 6 + 633 + 5 + 16 + 5 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1423628361 + 239723289 = 37731^2 + 15483^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 33301 + ... + 66600.

Almost surely, 2^1663351650 is an apocalyptic number.

1663351650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663351650 is an abundant number, since it is smaller than the sum of its proper divisors (2926346034).

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

1663351650 is a wasteful number, since it uses less digits than its factorization.

1663351650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99956 (or 99948 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 1663351650 is about 40784.2083409743. The cubic root of 1663351650 is about 1184.8445023757.

The spelling of 1663351650 in words is "one billion, six hundred sixty-three million, three hundred fifty-one thousand, six hundred fifty".