78667025 has 12 divisors (see below), whose sum is σ = 98048412. Its totient is φ = 62610240.

The previous prime is 78667021. The next prime is 78667033. The reversal of 78667025 is 52076687.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 7230721 + 71436304 = 2689^2 + 8452^2 .

It is not a de Polignac number, because 78667025 - 2² = 78667021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78667021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3062 + ... + 12911.

It is an arithmetic number, because the mean of its divisors is an integer number (8170701).

Almost surely, 2^78667025 is an apocalyptic number.

It is an amenable number.

78667025 is a deficient number, since it is larger than the sum of its proper divisors (19381387).

78667025 is a wasteful number, since it uses less digits than its factorization.

78667025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16180 (or 16175 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 78667025 is about 8869.4433308974. The cubic root of 78667025 is about 428.4803487668.

The spelling of 78667025 in words is "seventy-eight million, six hundred sixty-seven thousand, twenty-five".