12666046520 has 32 divisors (see below), whose sum is σ = 30174994800. Its totient is φ = 4768393728.

The previous prime is 12666046511. The next prime is 12666046531. The reversal of 12666046520 is 2564066621.

It is a super-2 number, since 2×12666046520² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 9312590 + ... + 9313949.

Almost surely, 2^12666046520 is an apocalyptic number.

12666046520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12666046520 is an abundant number, since it is smaller than the sum of its proper divisors (17508948280).

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

12666046520 is a wasteful number, since it uses less digits than its factorization.

12666046520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18626567 (or 18626563 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 12666046520 in words is "twelve billion, six hundred sixty-six million, forty-six thousand, five hundred twenty".