66346025 has 6 divisors (see below), whose sum is σ = 82269102. Its totient is φ = 53076800.

The previous prime is 66346009. The next prime is 66346039. The reversal of 66346025 is 52064366.

It can be written as a sum of positive squares in 3 ways, for example, as 2601769 + 63744256 = 1613^2 + 7984^2 .

It is not a de Polignac number, because 66346025 - 2⁴ = 66346009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66345982 and 66346000.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1326896 + ... + 1326945.

It is an arithmetic number, because the mean of its divisors is an integer number (13711517).

Almost surely, 2^66346025 is an apocalyptic number.

It is an amenable number.

66346025 is a deficient number, since it is larger than the sum of its proper divisors (15923077).

66346025 is a wasteful number, since it uses less digits than its factorization.

66346025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653851 (or 2653846 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 66346025 is about 8145.3069309879. The cubic root of 66346025 is about 404.8290189200.

The spelling of 66346025 in words is "sixty-six million, three hundred forty-six thousand, twenty-five".