1663688050 has 24 divisors (see below), whose sum is σ = 3102291396. Its totient is φ = 663791040.

The previous prime is 1663688029. The next prime is 1663688063. The reversal of 1663688050 is 508863661.

It can be written as a sum of positive squares in 6 ways, for example, as 1164925161 + 498762889 = 34131^2 + 22333^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1663687988 and 1663688006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22057 + ... + 61756.

Almost surely, 2^1663688050 is an apocalyptic number.

1663688050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663688050 is a deficient number, since it is larger than the sum of its proper divisors (1438603346).

1663688050 is a wasteful number, since it uses less digits than its factorization.

1663688050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84222 (or 84217 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 1663688050 is about 40788.3322777483. The cubic root of 1663688050 is about 1184.9243722023.

The spelling of 1663688050 in words is "one billion, six hundred sixty-three million, six hundred eighty-eight thousand, fifty".