13459525666 has 4 divisors (see below), whose sum is σ = 20189288502. Its totient is φ = 6729762832.

The previous prime is 13459525661. The next prime is 13459525669. The reversal of 13459525666 is 66652595431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66652595431 = 103 ⋅647112577.

It can be written as a sum of positive squares in only one way, i.e., 11011354225 + 2448171441 = 104935^2 + 49479^2 .

It is not an unprimeable number, because it can be changed into a prime (13459525661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3364881415 + ... + 3364881418.

Almost surely, 2^13459525666 is an apocalyptic number.

13459525666 is a deficient number, since it is larger than the sum of its proper divisors (6729762836).

13459525666 is an equidigital number, since it uses as much as digits as its factorization.

13459525666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6729762835.

The product of its digits is 5832000, while the sum is 52.

The spelling of 13459525666 in words is "thirteen billion, four hundred fifty-nine million, five hundred twenty-five thousand, six hundred sixty-six".