8665261 has 4 divisors (see below), whose sum is σ = 9453024. Its totient is φ = 7877500.

The previous prime is 8665259. The next prime is 8665277. The reversal of 8665261 is 1625668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8665261 - 2¹ = 8665259 is a prime.

It is a super-3 number, since 3×8665261³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

8665261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8665201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393865 + ... + 393886.

It is an arithmetic number, because the mean of its divisors is an integer number (2363256).

Almost surely, 2^8665261 is an apocalyptic number.

It is an amenable number.

8665261 is a deficient number, since it is larger than the sum of its proper divisors (787763).

8665261 is a wasteful number, since it uses less digits than its factorization.

8665261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787762.

The product of its digits is 17280, while the sum is 34.

The square root of 8665261 is about 2943.6815384820. The cubic root of 8665261 is about 205.3968991251.

The spelling of 8665261 in words is "eight million, six hundred sixty-five thousand, two hundred sixty-one".