66704123 has 4 divisors (see below), whose sum is σ = 66720480. Its totient is φ = 66687768.

The previous prime is 66704101. The next prime is 66704149. The reversal of 66704123 is 32140766.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 66704123 - 2⁸ = 66703867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66704153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3461 + ... + 12057.

It is an arithmetic number, because the mean of its divisors is an integer number (16680120).

Almost surely, 2^66704123 is an apocalyptic number.

66704123 is a deficient number, since it is larger than the sum of its proper divisors (16357).

66704123 is an equidigital number, since it uses as much as digits as its factorization.

66704123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16356.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 66704123 is about 8167.2592097961. The cubic root of 66704123 is about 405.5560578158.

Adding to 66704123 its reverse (32140766), we get a palindrome (98844889).

The spelling of 66704123 in words is "sixty-six million, seven hundred four thousand, one hundred twenty-three".