11668400385 has 8 divisors (see below), whose sum is σ = 18669440640. Its totient is φ = 6223146864.

The previous prime is 11668400333. The next prime is 11668400389. The reversal of 11668400385 is 58300486611.

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

It is not a de Polignac number, because 11668400385 - 2⁷ = 11668400257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11668400389) 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, 388946665 + ... + 388946694.

It is an arithmetic number, because the mean of its divisors is an integer number (2333680080).

Almost surely, 2^11668400385 is an apocalyptic number.

11668400385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11668400385 is a deficient number, since it is larger than the sum of its proper divisors (7001040255).

11668400385 is an equidigital number, since it uses as much as digits as its factorization.

11668400385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777893367.

The product of its (nonzero) digits is 138240, while the sum is 42.

Adding to 11668400385 its reverse (58300486611), we get a palindrome (69968886996).

The spelling of 11668400385 in words is "eleven billion, six hundred sixty-eight million, four hundred thousand, three hundred eighty-five".