66217026266 has 8 divisors (see below), whose sum is σ = 103644041184. Its totient is φ = 31669012540.

The previous prime is 66217026229. The next prime is 66217026277. The reversal of 66217026266 is 66262071266.

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

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, 719750240 + ... + 719750331.

It is an arithmetic number, because the mean of its divisors is an integer number (12955505148).

Almost surely, 2^66217026266 is an apocalyptic number.

66217026266 is a deficient number, since it is larger than the sum of its proper divisors (37427014918).

66217026266 is a wasteful number, since it uses less digits than its factorization.

66217026266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439500596.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 66217026266 in words is "sixty-six billion, two hundred seventeen million, twenty-six thousand, two hundred sixty-six".