65111001 has 4 divisors (see below), whose sum is σ = 86814672. Its totient is φ = 43407332.

The previous prime is 65110961. The next prime is 65111029. The reversal of 65111001 is 10011156.

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 65111001 - 2⁶ = 65110937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65111201) 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, 10851831 + ... + 10851836.

It is an arithmetic number, because the mean of its divisors is an integer number (21703668).

Almost surely, 2^65111001 is an apocalyptic number.

It is an amenable number.

65111001 is a deficient number, since it is larger than the sum of its proper divisors (21703671).

65111001 is a wasteful number, since it uses less digits than its factorization.

65111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21703670.

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 65111001 is about 8069.1388016318. The cubic root of 65111001 is about 402.3013198425.

Adding to 65111001 its reverse (10011156), we get a palindrome (75122157).

The spelling of 65111001 in words is "sixty-five million, one hundred eleven thousand, one".