66730426 has 8 divisors (see below), whose sum is σ = 114395040. Its totient is φ = 28598748.

The previous prime is 66730403. The next prime is 66730427. The reversal of 66730426 is 62403766.

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

It is a junction number, because it is equal to n+sod(n) for n = 66730391 and 66730400.

It is not an unprimeable number, because it can be changed into a prime (66730427) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2383216 + ... + 2383243.

It is an arithmetic number, because the mean of its divisors is an integer number (14299380).

Almost surely, 2^66730426 is an apocalyptic number.

66730426 is a deficient number, since it is larger than the sum of its proper divisors (47664614).

66730426 is a wasteful number, since it uses less digits than its factorization.

66730426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4766468.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 66730426 is about 8168.8693220053. The cubic root of 66730426 is about 405.6093575654.

The spelling of 66730426 in words is "sixty-six million, seven hundred thirty thousand, four hundred twenty-six".