66656656055562 has 8 divisors (see below), whose sum is σ = 133313312111136. Its totient is φ = 22218885351852.

The previous prime is 66656656055537. The next prime is 66656656055567. The reversal of 66656656055562 is 26555065665666.

It is a sphenic number, since it is the product of 3 distinct primes.

66656656055562 is an admirable number.

It is a super-2 number, since 2×66656656055562² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66656656055567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5554721337958 + ... + 5554721337969.

It is an arithmetic number, because the mean of its divisors is an integer number (16664164013892).

Almost surely, 2^{66656656055562} is an apocalyptic number.

66656656055562 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66656656055562 is a wasteful number, since it uses less digits than its factorization.

66656656055562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11109442675932.

The product of its (nonzero) digits is 1749600000, while the sum is 69.

The spelling of 66656656055562 in words is "sixty-six trillion, six hundred fifty-six billion, six hundred fifty-six million, fifty-five thousand, five hundred sixty-two".