12662651523 has 4 divisors (see below), whose sum is σ = 16883535368. Its totient is φ = 8441767680.

The previous prime is 12662651483. The next prime is 12662651531. The reversal of 12662651523 is 32515626621.

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

It is not a de Polignac number, because 12662651523 - 2⁹ = 12662651011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12662651423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2110441918 + ... + 2110441923.

It is an arithmetic number, because the mean of its divisors is an integer number (4220883842).

Almost surely, 2^12662651523 is an apocalyptic number.

12662651523 is a deficient number, since it is larger than the sum of its proper divisors (4220883845).

12662651523 is an equidigital number, since it uses as much as digits as its factorization.

12662651523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220883844.

The product of its digits is 129600, while the sum is 39.

The spelling of 12662651523 in words is "twelve billion, six hundred sixty-two million, six hundred fifty-one thousand, five hundred twenty-three".