66245085 has 24 divisors (see below), whose sum is σ = 116712024. Its totient is φ = 34750080.

The previous prime is 66245063. The next prime is 66245087. The reversal of 66245085 is 58054266.

It can be written as a sum of positive squares in 4 ways, for example, as 1764 + 66243321 = 42^2 + 8139^2 .

It is not a de Polignac number, because 66245085 - 2⁶ = 66245021 is a prime.

It is a super-2 number, since 2×66245085² = 8776822573314450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66245087) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 9322 + ... + 14811.

It is an arithmetic number, because the mean of its divisors is an integer number (4863001).

Almost surely, 2^66245085 is an apocalyptic number.

It is an amenable number.

66245085 is a deficient number, since it is larger than the sum of its proper divisors (50466939).

66245085 is a wasteful number, since it uses less digits than its factorization.

66245085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24205 (or 24202 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 66245085 is about 8139.1083663998. The cubic root of 66245085 is about 404.6236100697.

The spelling of 66245085 in words is "sixty-six million, two hundred forty-five thousand, eighty-five".