1668733788477 has 16 divisors (see below), whose sum is σ = 2557530898560. Its totient is φ = 948050242752.

The previous prime is 1668733788427. The next prime is 1668733788497. The reversal of 1668733788477 is 7748873378661.

It is not a de Polignac number, because 1668733788477 - 2¹⁵ = 1668733755709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1668733788399 and 1668733788408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668733788427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229659702 + ... + 229666967.

It is an arithmetic number, because the mean of its divisors is an integer number (159845681160).

Almost surely, 2^{1668733788477} is an apocalyptic number.

It is an amenable number.

1668733788477 is a deficient number, since it is larger than the sum of its proper divisors (888797110083).

1668733788477 is a wasteful number, since it uses less digits than its factorization.

1668733788477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459326852.

The product of its digits is 1593188352, while the sum is 75.

The spelling of 1668733788477 in words is "one trillion, six hundred sixty-eight billion, seven hundred thirty-three million, seven hundred eighty-eight thousand, four hundred seventy-seven".