12662645658 has 64 divisors (see below), whose sum is σ = 27518908032. Its totient is φ = 3861262080.

The previous prime is 12662645657. The next prime is 12662645663. The reversal of 12662645658 is 85654626621.

It is a self number, because there is not a number n which added to its sum of digits gives 12662645658.

It is not an unprimeable number, because it can be changed into a prime (12662645657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5644285 + ... + 5646527.

It is an arithmetic number, because the mean of its divisors is an integer number (429982938).

Almost surely, 2^12662645658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12662645658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13759454016).

12662645658 is an abundant number, since it is smaller than the sum of its proper divisors (14856262374).

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

12662645658 is a wasteful number, since it uses less digits than its factorization.

12662645658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879.

The product of its digits is 4147200, while the sum is 51.

The spelling of 12662645658 in words is "twelve billion, six hundred sixty-two million, six hundred forty-five thousand, six hundred fifty-eight".