1663068506450 has 54 divisors (see below), whose sum is σ = 3349796517549. Its totient is φ = 614012293440.

The previous prime is 1663068506413. The next prime is 1663068506503. The reversal of 1663068506450 is 546058603661.

It can be written as a sum of positive squares in 14 ways, for example, as 1400925530449 + 262142976001 = 1183607^2 + 511999^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=911885.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 118538036 + ... + 118552064.

Almost surely, 2^{1663068506450} is an apocalyptic number.

1663068506450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663068506450 is an abundant number, since it is smaller than the sum of its proper divisors (1686728011099).

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

1663068506450 is an frugal number, since it uses more digits than its factorization.

1663068506450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28096 (or 14049 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 50.

Multiplying 1663068506450 by its sum of digits (50), we get a square (83153425322500 = 9118850²).

1663068506450 divided by its sum of digits (50) gives a square (33261370129 = 182377²).

The spelling of 1663068506450 in words is "one trillion, six hundred sixty-three billion, sixty-eight million, five hundred six thousand, four hundred fifty".