11663673408 has 280 divisors, whose sum is σ = 35635704192. Its totient is φ = 3785854464.

The previous prime is 11663673397. The next prime is 11663673409. The reversal of 11663673408 is 80437636611.

11663673408 is a `hidden beast` number, since 1 + 1 + 6 + 636 + 7 + 3 + 4 + 0 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (11663673409) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 59206366 + ... + 59206562.

Almost surely, 2^11663673408 is an apocalyptic number.

11663673408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11663673408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17817852096).

11663673408 is an abundant number, since it is smaller than the sum of its proper divisors (23972030784).

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

11663673408 is an frugal number, since it uses more digits than its factorization.

11663673408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 11663673408 in words is "eleven billion, six hundred sixty-three million, six hundred seventy-three thousand, four hundred eight".