66563094668 has 48 divisors (see below), whose sum is σ = 141821272320. Its totient is φ = 26699989824.

The previous prime is 66563094659. The next prime is 66563094677. The reversal of 66563094668 is 86649036566.

It is an interprime number because it is at equal distance from previous prime (66563094659) and next prime (66563094677).

It is a super-2 number, since 2×66563094668² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 709571 + ... + 797882.

It is an arithmetic number, because the mean of its divisors is an integer number (2954609840).

Almost surely, 2^66563094668 is an apocalyptic number.

It is an amenable number.

66563094668 is an abundant number, since it is smaller than the sum of its proper divisors (75258177652).

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

66563094668 is a wasteful number, since it uses less digits than its factorization.

66563094668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507566 (or 1507564 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 59.

The spelling of 66563094668 in words is "sixty-six billion, five hundred sixty-three million, ninety-four thousand, six hundred sixty-eight".