2220170777766 has 24 divisors (see below), whose sum is σ = 4965543246144. Its totient is φ = 716184121680.

The previous prime is 2220170777761. The next prime is 2220170777801. The reversal of 2220170777766 is 6677770710222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220170777761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1989399781 + ... + 1989400896.

It is an arithmetic number, because the mean of its divisors is an integer number (206897635256).

Almost surely, 2^{2220170777766} is an apocalyptic number.

2220170777766 is an abundant number, since it is smaller than the sum of its proper divisors (2745372468378).

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

2220170777766 is a wasteful number, since it uses less digits than its factorization.

2220170777766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3978800716 (or 3978800713 counting only the distinct ones).

The product of its (nonzero) digits is 4840416, while the sum is 54.

The spelling of 2220170777766 in words is "two trillion, two hundred twenty billion, one hundred seventy million, seven hundred seventy-seven thousand, seven hundred sixty-six".