13666156036040 has 32 divisors (see below), whose sum is σ = 31329018087480. Its totient is φ = 5363321613312.

The previous prime is 13666156036021. The next prime is 13666156036087. The reversal of 13666156036040 is 4063065166631.

It can be written as a sum of positive squares in 4 ways, for example, as 8677160272804 + 4988995763236 = 2945702^2 + 2233606^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3223147889 + ... + 3223152128.

Almost surely, 2^{13666156036040} is an apocalyptic number.

13666156036040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13666156036040 is an abundant number, since it is smaller than the sum of its proper divisors (17662862051440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13666156036040 is a wasteful number, since it uses less digits than its factorization.

13666156036040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6446300081 (or 6446300077 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 13666156036040 in words is "thirteen trillion, six hundred sixty-six billion, one hundred fifty-six million, thirty-six thousand, forty".