12660078 has 16 divisors (see below), whose sum is σ = 25356240. Its totient is φ = 4214016.

The previous prime is 12660013. The next prime is 12660091. The reversal of 12660078 is 87006621.

It is a happy number.

12660078 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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, 5758 + ... + 7646.

It is an arithmetic number, because the mean of its divisors is an integer number (1584765).

Almost surely, 2^12660078 is an apocalyptic number.

12660078 is an abundant number, since it is smaller than the sum of its proper divisors (12696162).

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

12660078 is a wasteful number, since it uses less digits than its factorization.

12660078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 12660078 is about 3558.1003358534. The cubic root of 12660078 is about 233.0659308592.

Adding to 12660078 its reverse (87006621), we get a palindrome (99666699).

The spelling of 12660078 in words is "twelve million, six hundred sixty thousand, seventy-eight".