66656660106 has 16 divisors (see below), whose sum is σ = 133325509824. Its totient is φ = 22216855104.

The previous prime is 66656660101. The next prime is 66656660123. The reversal of 66656660106 is 60106665666.

66656660106 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66656660106² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66656660101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436030 + ... + 568713.

It is an arithmetic number, because the mean of its divisors is an integer number (8332844364).

Almost surely, 2^66656660106 is an apocalyptic number.

66656660106 is an abundant number, since it is smaller than the sum of its proper divisors (66668849718).

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

66656660106 is a wasteful number, since it uses less digits than its factorization.

66656660106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015805.

The product of its (nonzero) digits is 1399680, while the sum is 48.

The spelling of 66656660106 in words is "sixty-six billion, six hundred fifty-six million, six hundred sixty thousand, one hundred six".