66325025 has 24 divisors (see below), whose sum is σ = 89603640. Its totient is φ = 48407040.

The previous prime is 66325019. The next prime is 66325033. The reversal of 66325025 is 52052366.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 47210641 + 19114384 = 6871^2 + 4372^2 .

It is a de Polignac number, because none of the positive numbers 2^k-66325025 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 27779 + ... + 30071.

It is an arithmetic number, because the mean of its divisors is an integer number (3733485).

Almost surely, 2^66325025 is an apocalyptic number.

66325025 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66325025 is a deficient number, since it is larger than the sum of its proper divisors (23278615).

66325025 is a wasteful number, since it uses less digits than its factorization.

66325025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405 (or 2400 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 66325025 is about 8144.0177431044. The cubic root of 66325025 is about 404.7863019347.

The spelling of 66325025 in words is "sixty-six million, three hundred twenty-five thousand, twenty-five".