66886265 has 8 divisors (see below), whose sum is σ = 81778248. Its totient is φ = 52499200.

The previous prime is 66886247. The next prime is 66886283. The reversal of 66886265 is 56268866.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66886247) and next prime (66886283).

It can be written as a sum of positive squares in 4 ways, for example, as 29822521 + 37063744 = 5461^2 + 6088^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66886265 - 2²² = 62691961 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125936 + ... + 126465.

It is an arithmetic number, because the mean of its divisors is an integer number (10222281).

Almost surely, 2^66886265 is an apocalyptic number.

It is an amenable number.

66886265 is a deficient number, since it is larger than the sum of its proper divisors (14891983).

66886265 is a wasteful number, since it uses less digits than its factorization.

66886265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252459.

The product of its digits is 829440, while the sum is 47.

The square root of 66886265 is about 8178.4023500926. The cubic root of 66886265 is about 405.9248588969.

The spelling of 66886265 in words is "sixty-six million, eight hundred eighty-six thousand, two hundred sixty-five".