13155215463666 has 32 divisors (see below), whose sum is σ = 29785393509120. Its totient is φ = 4302334616112.

The previous prime is 13155215463661. The next prime is 13155215463727. The reversal of 13155215463666 is 66636451255131.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (13155215463661) 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, 2298252810 + ... + 2298258533.

It is an arithmetic number, because the mean of its divisors is an integer number (930793547160).

Almost surely, 2^{13155215463666} is an apocalyptic number.

13155215463666 is an abundant number, since it is smaller than the sum of its proper divisors (16630178045454).

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

13155215463666 is a wasteful number, since it uses less digits than its factorization.

13155215463666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4596511407 (or 4596511401 counting only the distinct ones).

The product of its digits is 11664000, while the sum is 54.

The spelling of 13155215463666 in words is "thirteen trillion, one hundred fifty-five billion, two hundred fifteen million, four hundred sixty-three thousand, six hundred sixty-six".