4123726665 has 8 divisors (see below), whose sum is σ = 6597962688. Its totient is φ = 2199320880.

The previous prime is 4123726661. The next prime is 4123726667. The reversal of 4123726665 is 5666273214.

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

It is not a de Polignac number, because 4123726665 - 2² = 4123726661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4123726661) 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 7 ways as a sum of consecutive naturals, for example, 137457541 + ... + 137457570.

It is an arithmetic number, because the mean of its divisors is an integer number (824745336).

Almost surely, 2^4123726665 is an apocalyptic number.

It is an amenable number.

4123726665 is a deficient number, since it is larger than the sum of its proper divisors (2474236023).

4123726665 is a wasteful number, since it uses less digits than its factorization.

4123726665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274915119.

The product of its digits is 362880, while the sum is 42.

The square root of 4123726665 is about 64216.2492286804. The cubic root of 4123726665 is about 1603.6021271776.

Adding to 4123726665 its reverse (5666273214), we get a palindrome (9789999879).

The spelling of 4123726665 in words is "four billion, one hundred twenty-three million, seven hundred twenty-six thousand, six hundred sixty-five".