106668420209 has 8 divisors (see below), whose sum is σ = 115163043240. Its totient is φ = 98215134336.

The previous prime is 106668420203. The next prime is 106668420227. The reversal of 106668420209 is 902024866601.

It can be written as a sum of positive squares in 4 ways, for example, as 1017418609 + 105651001600 = 31897^2 + 325040^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106668420209 is a prime.

It is a super-2 number, since 2×106668420209² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 106668420209.

It is not an unprimeable number, because it can be changed into a prime (106668420203) 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, 10328924 + ... + 10339245.

It is an arithmetic number, because the mean of its divisors is an integer number (14395380405).

Almost surely, 2^106668420209 is an apocalyptic number.

It is an amenable number.

106668420209 is a deficient number, since it is larger than the sum of its proper divisors (8494623031).

106668420209 is a wasteful number, since it uses less digits than its factorization.

106668420209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20668579.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 106668420209 in words is "one hundred six billion, six hundred sixty-eight million, four hundred twenty thousand, two hundred nine".