2166071206720 has 56 divisors (see below), whose sum is σ = 5158712982528. Its totient is φ = 866301504000.

The previous prime is 2166071206697. The next prime is 2166071206721. The reversal of 2166071206720 is 276021706612.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166071206721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1706145 + ... + 2691295.

It is an arithmetic number, because the mean of its divisors is an integer number (92119874688).

Almost surely, 2^{2166071206720} is an apocalyptic number.

2166071206720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166071206720 is an abundant number, since it is smaller than the sum of its proper divisors (2992641775808).

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

2166071206720 is an equidigital number, since it uses as much as digits as its factorization.

2166071206720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992039 (or 992029 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 2166071206720 in words is "two trillion, one hundred sixty-six billion, seventy-one million, two hundred six thousand, seven hundred twenty".