66304426 has 4 divisors (see below), whose sum is σ = 99456642. Its totient is φ = 33152212.

The previous prime is 66304393. The next prime is 66304439. The reversal of 66304426 is 62440366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50424201 + 15880225 = 7101^2 + 3985^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16576105 + ... + 16576108.

Almost surely, 2^66304426 is an apocalyptic number.

66304426 is a deficient number, since it is larger than the sum of its proper divisors (33152216).

66304426 is a wasteful number, since it uses less digits than its factorization.

66304426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33152215.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 66304426 is about 8142.7529742710. The cubic root of 66304426 is about 404.7443918794.

The spelling of 66304426 in words is "sixty-six million, three hundred four thousand, four hundred twenty-six".