1213164510066 has 48 divisors (see below), whose sum is σ = 2631406999104. Its totient is φ = 403944738912.

The previous prime is 1213164510031. The next prime is 1213164510121. The reversal of 1213164510066 is 6600154613121.

1213164510066 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 1 + 645 + 1 + 0 + 0 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1213164510066.

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 23 ways as a sum of consecutive naturals, for example, 75498565 + ... + 75514631.

It is an arithmetic number, because the mean of its divisors is an integer number (54820979148).

Almost surely, 2^{1213164510066} is an apocalyptic number.

1213164510066 is an abundant number, since it is smaller than the sum of its proper divisors (1418242489038).

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

1213164510066 is a wasteful number, since it uses less digits than its factorization.

1213164510066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20415 (or 20412 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 1213164510066 in words is "one trillion, two hundred thirteen billion, one hundred sixty-four million, five hundred ten thousand, sixty-six".