66469649826 has 8 divisors (see below), whose sum is σ = 132939299664. Its totient is φ = 22156549940.

The previous prime is 66469649801. The next prime is 66469649849. The reversal of 66469649826 is 62894696466.

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

66469649826 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5539137480 + ... + 5539137491.

It is an arithmetic number, because the mean of its divisors is an integer number (16617412458).

Almost surely, 2^66469649826 is an apocalyptic number.

66469649826 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66469649826 is a wasteful number, since it uses less digits than its factorization.

66469649826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11078274976.

The product of its digits is 161243136, while the sum is 66.

The spelling of 66469649826 in words is "sixty-six billion, four hundred sixty-nine million, six hundred forty-nine thousand, eight hundred twenty-six".