65604406011 has 4 divisors (see below), whose sum is σ = 87472541352. Its totient is φ = 43736270672.

The previous prime is 65604405967. The next prime is 65604406031. The reversal of 65604406011 is 11060440656.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 65604406011 - 2⁶ = 65604405947 is a prime.

It is a super-2 number, since 2×65604406011² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65604406031) 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, 10934067666 + ... + 10934067671.

It is an arithmetic number, because the mean of its divisors is an integer number (21868135338).

Almost surely, 2^65604406011 is an apocalyptic number.

65604406011 is a deficient number, since it is larger than the sum of its proper divisors (21868135341).

65604406011 is a wasteful number, since it uses less digits than its factorization.

65604406011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21868135340.

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 65604406011 its reverse (11060440656), we get a palindrome (76664846667).

The spelling of 65604406011 in words is "sixty-five billion, six hundred four million, four hundred six thousand, eleven".