2206645287966 has 128 divisors (see below), whose sum is σ = 6022401960960. Its totient is φ = 584527021056.

The previous prime is 2206645287961. The next prime is 2206645288037. The reversal of 2206645287966 is 6697825466022.

It is a happy number.

2206645287966 is a `hidden beast` number, since 2 + 206 + 64 + 5 + 287 + 96 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2206645287961) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2132095 + ... + 2993178.

It is an arithmetic number, because the mean of its divisors is an integer number (47050015320).

Almost surely, 2^{2206645287966} is an apocalyptic number.

2206645287966 is an abundant number, since it is smaller than the sum of its proper divisors (3815756672994).

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

2206645287966 is a wasteful number, since it uses less digits than its factorization.

2206645287966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125375 (or 5125369 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 63.

The spelling of 2206645287966 in words is "two trillion, two hundred six billion, six hundred forty-five million, two hundred eighty-seven thousand, nine hundred sixty-six".