12690866916 has 576 divisors, whose sum is σ = 44208192000. Its totient is φ = 3127444992.

The previous prime is 12690866833. The next prime is 12690866921. The reversal of 12690866916 is 61966809621.

It is a happy number.

It is a super-2 number, since 2×12690866916² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 173847456 + ... + 173847528.

Almost surely, 2^12690866916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12690866916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22104096000).

12690866916 is an abundant number, since it is smaller than the sum of its proper divisors (31517325084).

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

12690866916 is a wasteful number, since it uses less digits than its factorization.

12690866916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 12690866916 in words is "twelve billion, six hundred ninety million, eight hundred sixty-six thousand, nine hundred sixteen".