64642226664663 has 6 divisors (see below), whose sum is σ = 93372105182304. Its totient is φ = 43094817776436.

The previous prime is 64642226664647. The next prime is 64642226664677. The reversal of 64642226664663 is 36646662224646.

It is not a de Polignac number, because 64642226664663 - 2⁴ = 64642226664647 is a prime.

It is a super-2 number, since 2×64642226664663² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64642226664663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64642226665663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3591234814695 + ... + 3591234814712.

It is an arithmetic number, because the mean of its divisors is an integer number (15562017530384).

Almost surely, 2^{64642226664663} is an apocalyptic number.

64642226664663 is a deficient number, since it is larger than the sum of its proper divisors (28729878517641).

64642226664663 is a wasteful number, since it uses less digits than its factorization.

64642226664663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7182469629413 (or 7182469629410 counting only the distinct ones).

The product of its digits is 429981696, while the sum is 63.

The spelling of 64642226664663 in words is "sixty-four trillion, six hundred forty-two billion, two hundred twenty-six million, six hundred sixty-four thousand, six hundred sixty-three".