12575066778 has 48 divisors (see below), whose sum is σ = 28272404160. Its totient is φ = 4189120416.

The previous prime is 12575066747. The next prime is 12575066813. The reversal of 12575066778 is 87766057521.

It is a happy number.

12575066778 is a `hidden beast` number, since 1 + 2 + 5 + 7 + 506 + 67 + 78 = 666.

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 23 ways as a sum of consecutive naturals, for example, 890638 + ... + 904646.

It is an arithmetic number, because the mean of its divisors is an integer number (589008420).

Almost surely, 2^12575066778 is an apocalyptic number.

12575066778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12575066778 is an abundant number, since it is smaller than the sum of its proper divisors (15697337382).

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

12575066778 is a wasteful number, since it uses less digits than its factorization.

12575066778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15873 (or 15861 counting only the distinct ones).

The product of its (nonzero) digits is 4939200, while the sum is 54.

The spelling of 12575066778 in words is "twelve billion, five hundred seventy-five million, sixty-six thousand, seven hundred seventy-eight".