65611011 has 4 divisors (see below), whose sum is σ = 87481352. Its totient is φ = 43740672.

The previous prime is 65610989. The next prime is 65611037. The reversal of 65611011 is 11011656.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 65611011 - 2¹³ = 65602819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65611061) 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, 10935166 + ... + 10935171.

It is an arithmetic number, because the mean of its divisors is an integer number (21870338).

Almost surely, 2^65611011 is an apocalyptic number.

65611011 is a deficient number, since it is larger than the sum of its proper divisors (21870341).

65611011 is a wasteful number, since it uses less digits than its factorization.

65611011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21870340.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 65611011 is about 8100.0624071670. The cubic root of 65611011 is about 403.3284988303.

Adding to 65611011 its reverse (11011656), we get a palindrome (76622667).

The spelling of 65611011 in words is "sixty-five million, six hundred eleven thousand, eleven".