65666094525 has 30 divisors (see below), whose sum is σ = 121636310202. Its totient is φ = 35021916000.

The previous prime is 65666094499. The next prime is 65666094539. The reversal of 65666094525 is 52549066656.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1930547844 + 63735546681 = 43938^2 + 252459^2 .

It is not a de Polignac number, because 65666094525 - 2¹² = 65666090429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 16211826 + ... + 16215875.

Almost surely, 2^65666094525 is an apocalyptic number.

It is an amenable number.

65666094525 is a deficient number, since it is larger than the sum of its proper divisors (55970215677).

65666094525 is a wasteful number, since it uses less digits than its factorization.

65666094525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32427723 (or 32427709 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 54.

The spelling of 65666094525 in words is "sixty-five billion, six hundred sixty-six million, ninety-four thousand, five hundred twenty-five".