66450925 has 12 divisors (see below), whose sum is σ = 82623060. Its totient is φ = 53016320.

The previous prime is 66450889. The next prime is 66450983. The reversal of 66450925 is 52905466.

It can be written as a sum of positive squares in 6 ways, for example, as 14884164 + 51566761 = 3858^2 + 7181^2 .

It is not a de Polignac number, because 66450925 - 2⁹ = 66450413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6309 + ... + 13141.

It is an arithmetic number, because the mean of its divisors is an integer number (6885255).

Almost surely, 2^66450925 is an apocalyptic number.

It is an amenable number.

66450925 is a deficient number, since it is larger than the sum of its proper divisors (16172135).

66450925 is a wasteful number, since it uses less digits than its factorization.

66450925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7232 (or 7227 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 66450925 is about 8151.7436785022. The cubic root of 66450925 is about 405.0422655682.

The spelling of 66450925 in words is "sixty-six million, four hundred fifty thousand, nine hundred twenty-five".