66150625 has 20 divisors (see below), whose sum is σ = 84263652. Its totient is φ = 51896000.

The previous prime is 66150619. The next prime is 66150631. The reversal of 66150625 is 52605166.

66150625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66150619) and next prime (66150631).

It can be written as a sum of positive squares in 10 ways, for example, as 60279696 + 5870929 = 7764^2 + 2423^2 .

It is not a de Polignac number, because 66150625 - 2⁹ = 66150113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32127 + ... + 34123.

Almost surely, 2^66150625 is an apocalyptic number.

It is an amenable number.

66150625 is a deficient number, since it is larger than the sum of its proper divisors (18113027).

66150625 is an equidigital number, since it uses as much as digits as its factorization.

66150625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070 (or 2055 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 66150625 is about 8133.3034493987. The cubic root of 66150625 is about 404.4311986772.

The spelling of 66150625 in words is "sixty-six million, one hundred fifty thousand, six hundred twenty-five".