2117066662172 has 48 divisors (see below), whose sum is σ = 4630348343040. Its totient is φ = 822814416000.

The previous prime is 2117066662169. The next prime is 2117066662177. The reversal of 2117066662172 is 2712666607112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117066662177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8276954 + ... + 8528897.

It is an arithmetic number, because the mean of its divisors is an integer number (96465590480).

Almost surely, 2^{2117066662172} is an apocalyptic number.

2117066662172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2117066662172 is an abundant number, since it is smaller than the sum of its proper divisors (2513281680868).

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

2117066662172 is a wasteful number, since it uses less digits than its factorization.

2117066662172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16806282 (or 16806280 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 2117066662172 in words is "two trillion, one hundred seventeen billion, sixty-six million, six hundred sixty-two thousand, one hundred seventy-two".