66124123 has 12 divisors (see below), whose sum is σ = 75374040. Its totient is φ = 57822336.

The previous prime is 66124099. The next prime is 66124127. The reversal of 66124123 is 32142166.

It is a de Polignac number, because none of the positive numbers 2^k-66124123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66124127) 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 11 ways as a sum of consecutive naturals, for example, 7086 + ... + 13507.

It is an arithmetic number, because the mean of its divisors is an integer number (6281170).

Almost surely, 2^66124123 is an apocalyptic number.

66124123 is a deficient number, since it is larger than the sum of its proper divisors (9249917).

66124123 is a wasteful number, since it uses less digits than its factorization.

66124123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20638 (or 20625 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 66124123 is about 8131.6740588885. The cubic root of 66124123 is about 404.3771822195.

Adding to 66124123 its reverse (32142166), we get a palindrome (98266289).

The spelling of 66124123 in words is "sixty-six million, one hundred twenty-four thousand, one hundred twenty-three".