65401664333 has 4 divisors (see below), whose sum is σ = 65404407900. Its totient is φ = 65398920768.

The previous prime is 65401664323. The next prime is 65401664347. The reversal of 65401664333 is 33346610456.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 52586745124 + 12814919209 = 229318^2 + 113203^2 .

It is a cyclic number.

It is not a de Polignac number, because 65401664333 - 2²⁰ = 65400615757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65401664323) 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, 1335710 + ... + 1383807.

It is an arithmetic number, because the mean of its divisors is an integer number (16351101975).

Almost surely, 2^65401664333 is an apocalyptic number.

It is an amenable number.

65401664333 is a deficient number, since it is larger than the sum of its proper divisors (2743567).

65401664333 is a wasteful number, since it uses less digits than its factorization.

65401664333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743566.

The product of its (nonzero) digits is 466560, while the sum is 41.

The spelling of 65401664333 in words is "sixty-five billion, four hundred one million, six hundred sixty-four thousand, three hundred thirty-three".