66031667266 has 8 divisors (see below), whose sum is σ = 99050484924. Its totient is φ = 33014838960.

The previous prime is 66031667249. The next prime is 66031667279. The reversal of 66031667266 is 66276613066.

It can be written as a sum of positive squares in 2 ways, for example, as 62160961041 + 3870706225 = 249321^2 + 62215^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411385 + ... + 548908.

Almost surely, 2^66031667266 is an apocalyptic number.

66031667266 is a deficient number, since it is larger than the sum of its proper divisors (33018817658).

66031667266 is a wasteful number, since it uses less digits than its factorization.

66031667266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994676.

The product of its (nonzero) digits is 1959552, while the sum is 49.

The spelling of 66031667266 in words is "sixty-six billion, thirty-one million, six hundred sixty-seven thousand, two hundred sixty-six".