4135666523 has 6 divisors (see below), whose sum is σ = 4174989156. Its totient is φ = 4096356432.

The previous prime is 4135666487. The next prime is 4135666529. The reversal of 4135666523 is 3256665314.

4135666523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-4135666523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4135666529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 662111 + ... + 668327.

It is an arithmetic number, because the mean of its divisors is an integer number (695831526).

Almost surely, 2^4135666523 is an apocalyptic number.

4135666523 is a deficient number, since it is larger than the sum of its proper divisors (39322633).

4135666523 is an frugal number, since it uses more digits than its factorization.

4135666523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12541 (or 6324 counting only the distinct ones).

The product of its digits is 388800, while the sum is 41.

The square root of 4135666523 is about 64309.1480506467. The cubic root of 4135666523 is about 1605.1483282785.

The spelling of 4135666523 in words is "four billion, one hundred thirty-five million, six hundred sixty-six thousand, five hundred twenty-three".