12810155666 has 32 divisors (see below), whose sum is σ = 24015346560. Its totient is φ = 4978742400.

The previous prime is 12810155663. The next prime is 12810155669. The reversal of 12810155666 is 66655101821.

It is an interprime number because it is at equal distance from previous prime (12810155663) and next prime (12810155669).

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12810155663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38705 + ... + 164676.

It is an arithmetic number, because the mean of its divisors is an integer number (750479580).

Almost surely, 2^12810155666 is an apocalyptic number.

12810155666 is a deficient number, since it is larger than the sum of its proper divisors (11205190894).

12810155666 is a wasteful number, since it uses less digits than its factorization.

12810155666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203810.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 12810155666 in words is "twelve billion, eight hundred ten million, one hundred fifty-five thousand, six hundred sixty-six".