66250265 has 16 divisors (see below), whose sum is σ = 81939600. Its totient is φ = 51415936.

The previous prime is 66250253. The next prime is 66250277. The reversal of 66250265 is 56205266.

It is an interprime number because it is at equal distance from previous prime (66250253) and next prime (66250277).

It can be written as a sum of positive squares in 8 ways, for example, as 5285401 + 60964864 = 2299^2 + 7808^2 .

It is not a de Polignac number, because 66250265 - 2¹⁰ = 66249241 is a prime.

It is a super-2 number, since 2×66250265² = 8778195225140450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 744341 + ... + 744429.

It is an arithmetic number, because the mean of its divisors is an integer number (5121225).

Almost surely, 2^66250265 is an apocalyptic number.

It is an amenable number.

66250265 is a deficient number, since it is larger than the sum of its proper divisors (15689335).

66250265 is an frugal number, since it uses more digits than its factorization.

66250265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 66250265 is about 8139.4265768542. The cubic root of 66250265 is about 404.6341562391.

The spelling of 66250265 in words is "sixty-six million, two hundred fifty thousand, two hundred sixty-five".