66102415240123 has 4 divisors (see below), whose sum is σ = 66102600022200. Its totient is φ = 66102230458048.

The previous prime is 66102415240109. The next prime is 66102415240237. The reversal of 66102415240123 is 32104251420166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66102415240123 - 2²⁹ = 66101878369211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66102415247123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91853398 + ... + 92570251.

It is an arithmetic number, because the mean of its divisors is an integer number (16525650005550).

Almost surely, 2^{66102415240123} is an apocalyptic number.

66102415240123 is a deficient number, since it is larger than the sum of its proper divisors (184782077).

66102415240123 is a wasteful number, since it uses less digits than its factorization.

66102415240123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184782076.

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 66102415240123 its reverse (32104251420166), we get a palindrome (98206666660289).

The spelling of 66102415240123 in words is "sixty-six trillion, one hundred two billion, four hundred fifteen million, two hundred forty thousand, one hundred twenty-three".