667968229433406 has 16 divisors (see below), whose sum is σ = 1457385227854848. Its totient is φ = 202414614979800.

The previous prime is 667968229433399. The next prime is 667968229433443. The reversal of 667968229433406 is 604334922869766.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5060365374430 + ... + 5060365374561.

It is an arithmetic number, because the mean of its divisors is an integer number (91086576740928).

Almost surely, 2^{667968229433406} is an apocalyptic number.

667968229433406 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

667968229433406 is an abundant number, since it is smaller than the sum of its proper divisors (789416998421442).

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

667968229433406 is a wasteful number, since it uses less digits than its factorization.

667968229433406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10120730749007.

The product of its (nonzero) digits is 3386105856, while the sum is 75.

The spelling of 667968229433406 in words is "six hundred sixty-seven trillion, nine hundred sixty-eight billion, two hundred twenty-nine million, four hundred thirty-three thousand, four hundred six".