66123410 has 8 divisors (see below), whose sum is σ = 119022156. Its totient is φ = 26449360.

The previous prime is 66123389. The next prime is 66123443. The reversal of 66123410 is 1432166.

It is a happy number.

66123410 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 2 ways, for example, as 65237929 + 885481 = 8077^2 + 941^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3306161 + ... + 3306180.

Almost surely, 2^66123410 is an apocalyptic number.

66123410 is a deficient number, since it is larger than the sum of its proper divisors (52898746).

66123410 is a wasteful number, since it uses less digits than its factorization.

66123410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6612348.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 66123410 is about 8131.6302178591. The cubic root of 66123410 is about 404.3757287814.

Adding to 66123410 its reverse (1432166), we get a palindrome (67555576).

The spelling of 66123410 in words is "sixty-six million, one hundred twenty-three thousand, four hundred ten".