66220240426 has 8 divisors (see below), whose sum is σ = 100527112224. Its totient is φ = 32711203020.

The previous prime is 66220240379. The next prime is 66220240481. The reversal of 66220240426 is 62404202266.

66220240426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×66220240426² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66220240391 and 66220240400.

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, 199458390 + ... + 199458721.

It is an arithmetic number, because the mean of its divisors is an integer number (12565889028).

Almost surely, 2^66220240426 is an apocalyptic number.

66220240426 is a deficient number, since it is larger than the sum of its proper divisors (34306871798).

66220240426 is a wasteful number, since it uses less digits than its factorization.

66220240426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398917196.

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 66220240426 in words is "sixty-six billion, two hundred twenty million, two hundred forty thousand, four hundred twenty-six".