66446426 has 16 divisors (see below), whose sum is σ = 101500800. Its totient is φ = 32617728.

The previous prime is 66446407. The next prime is 66446437. The reversal of 66446426 is 62464466.

It is a super-3 number, since 3×66446426³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66446426.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29405 + ... + 31583.

It is an arithmetic number, because the mean of its divisors is an integer number (6343800).

Almost surely, 2^66446426 is an apocalyptic number.

66446426 is a deficient number, since it is larger than the sum of its proper divisors (35054374).

66446426 is a wasteful number, since it uses less digits than its factorization.

66446426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2453.

The product of its digits is 165888, while the sum is 38.

The square root of 66446426 is about 8151.4677206010. The cubic root of 66446426 is about 405.0331243547.

The spelling of 66446426 in words is "sixty-six million, four hundred forty-six thousand, four hundred twenty-six".