2166706650992 has 160 divisors (see below), whose sum is σ = 4807008998400. Its totient is φ = 938696822784.

The previous prime is 2166706650967. The next prime is 2166706651033. The reversal of 2166706650992 is 2990566076612.

It is a super-2 number, since 2×2166706650992² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 356421809 + ... + 356427887.

It is an arithmetic number, because the mean of its divisors is an integer number (30043806240).

Almost surely, 2^{2166706650992} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2166706650992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2403504499200).

2166706650992 is an abundant number, since it is smaller than the sum of its proper divisors (2640302347408).

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

2166706650992 is a wasteful number, since it uses less digits than its factorization.

2166706650992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7763 (or 7757 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 59.

The spelling of 2166706650992 in words is "two trillion, one hundred sixty-six billion, seven hundred six million, six hundred fifty thousand, nine hundred ninety-two".