22066644642 has 32 divisors (see below), whose sum is σ = 50445849600. Its totient is φ = 6303780048.

The previous prime is 22066644641. The next prime is 22066644647. The reversal of 22066644642 is 24644666022.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 22066644594 and 22066644603.

It is not an unprimeable number, because it can be changed into a prime (22066644641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260209 + ... + 334427.

It is an arithmetic number, because the mean of its divisors is an integer number (1576432800).

Almost surely, 2^22066644642 is an apocalyptic number.

22066644642 is an abundant number, since it is smaller than the sum of its proper divisors (28379204958).

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

22066644642 is a wasteful number, since it uses less digits than its factorization.

22066644642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81310.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 22066644642 in words is "twenty-two billion, sixty-six million, six hundred forty-four thousand, six hundred forty-two".