13156625066 has 16 divisors (see below), whose sum is σ = 21344234184. Its totient is φ = 6046224384.

The previous prime is 13156625021. The next prime is 13156625087. The reversal of 13156625066 is 66052665131.

It can be written as a sum of positive squares in 4 ways, for example, as 3413948041 + 9742677025 = 58429^2 + 98705^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1079831 + ... + 1091946.

Almost surely, 2^13156625066 is an apocalyptic number.

13156625066 is a deficient number, since it is larger than the sum of its proper divisors (8187609118).

13156625066 is a wasteful number, since it uses less digits than its factorization.

13156625066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172025.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 13156625066 in words is "thirteen billion, one hundred fifty-six million, six hundred twenty-five thousand, sixty-six".