65881265 has 8 divisors (see below), whose sum is σ = 83218560. Its totient is φ = 49930992.

The previous prime is 65881253. The next prime is 65881337. The reversal of 65881265 is 56218856.

65881265 = 13² + 14² + ... + 582².

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

It is a cyclic number.

It is not a de Polignac number, because 65881265 - 2⁸ = 65881009 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346649 + ... + 346838.

It is an arithmetic number, because the mean of its divisors is an integer number (10402320).

Almost surely, 2^65881265 is an apocalyptic number.

It is an amenable number.

65881265 is a deficient number, since it is larger than the sum of its proper divisors (17337295).

65881265 is a wasteful number, since it uses less digits than its factorization.

65881265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693511.

The product of its digits is 115200, while the sum is 41.

The square root of 65881265 is about 8116.7274809494. The cubic root of 65881265 is about 403.8815148570.

The spelling of 65881265 in words is "sixty-five million, eight hundred eighty-one thousand, two hundred sixty-five".