1663772773603 has 8 divisors (see below), whose sum is σ = 1709799021648. Its totient is φ = 1617802284384.

The previous prime is 1663772773591. The next prime is 1663772773613. The reversal of 1663772773603 is 3063772773661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1663772773603 - 2²⁵ = 1663739219171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1663772773613) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13879201 + ... + 13998562.

It is an arithmetic number, because the mean of its divisors is an integer number (213724877706).

Almost surely, 2^{1663772773603} is an apocalyptic number.

1663772773603 is a deficient number, since it is larger than the sum of its proper divisors (46026248045).

1663772773603 is a wasteful number, since it uses less digits than its factorization.

1663772773603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27879413.

The product of its (nonzero) digits is 28005264, while the sum is 58.

Adding to 1663772773603 its sum of digits (58), we get a palindrome (1663772773661).

The spelling of 1663772773603 in words is "one trillion, six hundred sixty-three billion, seven hundred seventy-two million, seven hundred seventy-three thousand, six hundred three".