665015546425 has 12 divisors (see below), whose sum is σ = 825126162256. Its totient is φ = 531685414800.

The previous prime is 665015546423. The next prime is 665015546467. The reversal of 665015546425 is 524645510566.

665015546425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665015546425 - 2¹ = 665015546423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665015546423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8134071 + ... + 8215420.

Almost surely, 2^665015546425 is an apocalyptic number.

It is an amenable number.

665015546425 is a deficient number, since it is larger than the sum of its proper divisors (160110615831).

665015546425 is a wasteful number, since it uses less digits than its factorization.

665015546425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16351128 (or 16351123 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 49.

The spelling of 665015546425 in words is "six hundred sixty-five billion, fifteen million, five hundred forty-six thousand, four hundred twenty-five".