2196606466656 has 144 divisors (see below), whose sum is σ = 7139407661568. Its totient is φ = 627563462400.

The previous prime is 2196606466651. The next prime is 2196606466669. The reversal of 2196606466656 is 6566646066912.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 2196606466593 and 2196606466602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2196606466651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57983401 + ... + 58021271.

It is an arithmetic number, because the mean of its divisors is an integer number (49579219872).

Almost surely, 2^{2196606466656} is an apocalyptic number.

It is an amenable number.

2196606466656 is an abundant number, since it is smaller than the sum of its proper divisors (4942801194912).

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

2196606466656 is a wasteful number, since it uses less digits than its factorization.

2196606466656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66665 (or 66654 counting only the distinct ones).

The product of its (nonzero) digits is 100776960, while the sum is 63.

The spelling of 2196606466656 in words is "two trillion, one hundred ninety-six billion, six hundred six million, four hundred sixty-six thousand, six hundred fifty-six".