66601426 has 8 divisors (see below), whose sum is σ = 100052604. Its totient is φ = 33250560.

The previous prime is 66601421. The next prime is 66601463. The reversal of 66601426 is 62410666.

66601426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 61074225 + 5527201 = 7815^2 + 2351^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66601421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23395 + ... + 26086.

Almost surely, 2^66601426 is an apocalyptic number.

66601426 is a deficient number, since it is larger than the sum of its proper divisors (33451178).

66601426 is a wasteful number, since it uses less digits than its factorization.

66601426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50156.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 66601426 is about 8160.9696727779. The cubic root of 66601426 is about 405.3478208972.

The spelling of 66601426 in words is "sixty-six million, six hundred one thousand, four hundred twenty-six".