1663772773660 has 12 divisors (see below), whose sum is σ = 3493922824728. Its totient is φ = 665509109456.

The previous prime is 1663772773643. The next prime is 1663772773661. The reversal of 1663772773660 is 663772773661.

It is a super-3 number, since 3×1663772773660³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663772773661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41594319322 + ... + 41594319361.

It is an arithmetic number, because the mean of its divisors is an integer number (291160235394).

Almost surely, 2^{1663772773660} is an apocalyptic number.

1663772773660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1663772773660 is an abundant number, since it is smaller than the sum of its proper divisors (1830150051068).

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

1663772773660 is a wasteful number, since it uses less digits than its factorization.

1663772773660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83188638692 (or 83188638690 counting only the distinct ones).

The product of its (nonzero) digits is 56010528, while the sum is 61.

Subtracting from 1663772773660 its reverse (663772773661), we obtain a palindrome (999999999999).

The spelling of 1663772773660 in words is "one trillion, six hundred sixty-three billion, seven hundred seventy-two million, seven hundred seventy-three thousand, six hundred sixty".