66259442 has 4 divisors (see below), whose sum is σ = 99389166. Its totient is φ = 33129720.

The previous prime is 66259397. The next prime is 66259447. The reversal of 66259442 is 24495266.

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., 38180041 + 28079401 = 6179^2 + 5299^2 .

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 66259396 and 66259405.

It is not an unprimeable number, because it can be changed into a prime (66259447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16564859 + ... + 16564862.

Almost surely, 2^66259442 is an apocalyptic number.

66259442 is a deficient number, since it is larger than the sum of its proper divisors (33129724).

66259442 is a wasteful number, since it uses less digits than its factorization.

66259442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33129723.

The product of its digits is 103680, while the sum is 38.

The square root of 66259442 is about 8139.9902948345. The cubic root of 66259442 is about 404.6528387113.

The spelling of 66259442 in words is "sixty-six million, two hundred fifty-nine thousand, four hundred forty-two".