64660420044222 has 16 divisors (see below), whose sum is σ = 129340886800512. Its totient is φ = 21550132229400.

The previous prime is 64660420044217. The next prime is 64660420044257. The reversal of 64660420044222 is 22244002406646.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835237738 + ... + 835315149.

It is an arithmetic number, because the mean of its divisors is an integer number (8083805425032).

Almost surely, 2^{64660420044222} is an apocalyptic number.

64660420044222 is an abundant number, since it is smaller than the sum of its proper divisors (64680466756290).

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

64660420044222 is a wasteful number, since it uses less digits than its factorization.

64660420044222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670559343.

The product of its (nonzero) digits is 884736, while the sum is 42.

The spelling of 64660420044222 in words is "sixty-four trillion, six hundred sixty billion, four hundred twenty million, forty-four thousand, two hundred twenty-two".