66446666426 has 8 divisors (see below), whose sum is σ = 113908571040. Its totient is φ = 28477142748.

The previous prime is 66446666417. The next prime is 66446666437. The reversal of 66446666426 is 62466664466.

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

It is a super-2 number, since 2×66446666426² (a number of 22 digits) contains 22 as substring.

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, 2373095216 + ... + 2373095243.

It is an arithmetic number, because the mean of its divisors is an integer number (14238571380).

Almost surely, 2^66446666426 is an apocalyptic number.

66446666426 is a deficient number, since it is larger than the sum of its proper divisors (47461904614).

66446666426 is a wasteful number, since it uses less digits than its factorization.

66446666426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4746190468.

The product of its digits is 35831808, while the sum is 56.

The spelling of 66446666426 in words is "sixty-six billion, four hundred forty-six million, six hundred sixty-six thousand, four hundred twenty-six".