663477774366 has 16 divisors (see below), whose sum is σ = 1447587871488. Its totient is φ = 201053871000.

The previous prime is 663477774361. The next prime is 663477774367.

663477774366 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 10052693551 = 663477774366 / (6 + 6 + 3 + 4 + 7 + 7 + 7 + 7 + 4 + 3 + 6 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 663477774297 and 663477774306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663477774361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5026346710 + ... + 5026346841.

It is an arithmetic number, because the mean of its divisors is an integer number (90474241968).

Almost surely, 2^663477774366 is an apocalyptic number.

663477774366 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

663477774366 is an abundant number, since it is smaller than the sum of its proper divisors (784110097122).

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

663477774366 is a wasteful number, since it uses less digits than its factorization.

663477774366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10052693567.

The product of its digits is 448084224, while the sum is 66.

The spelling of 663477774366 in words is "six hundred sixty-three billion, four hundred seventy-seven million, seven hundred seventy-four thousand, three hundred sixty-six".