12206415666 has 16 divisors (see below), whose sum is σ = 24485277024. Its totient is φ = 4056730944.

The previous prime is 12206415649. The next prime is 12206415707. The reversal of 12206415666 is 66651460221.

It is a super-2 number, since 2×12206415666² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3016380 + ... + 3020423.

It is an arithmetic number, because the mean of its divisors is an integer number (1530329814).

Almost surely, 2^12206415666 is an apocalyptic number.

12206415666 is an abundant number, since it is smaller than the sum of its proper divisors (12278861358).

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

12206415666 is a wasteful number, since it uses less digits than its factorization.

12206415666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6037145.

The product of its (nonzero) digits is 103680, while the sum is 39.

Adding to 12206415666 its reverse (66651460221), we get a palindrome (78857875887).

The spelling of 12206415666 in words is "twelve billion, two hundred six million, four hundred fifteen thousand, six hundred sixty-six".