12662618660 has 12 divisors (see below), whose sum is σ = 26591499228. Its totient is φ = 5065047456.

The previous prime is 12662618653. The next prime is 12662618677. The reversal of 12662618660 is 6681626621.

It can be written as a sum of positive squares in 2 ways, for example, as 6169159936 + 6493458724 = 78544^2 + 80582^2 .

It is a super-3 number, since 3×12662618660³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316565447 + ... + 316565486.

It is an arithmetic number, because the mean of its divisors is an integer number (2215958269).

Almost surely, 2^12662618660 is an apocalyptic number.

12662618660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12662618660 is an abundant number, since it is smaller than the sum of its proper divisors (13928880568).

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

12662618660 is a wasteful number, since it uses less digits than its factorization.

12662618660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633130942 (or 633130940 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 12662618660 in words is "twelve billion, six hundred sixty-two million, six hundred eighteen thousand, six hundred sixty".