65665016531 has 8 divisors (see below), whose sum is σ = 65856813600. Its totient is φ = 65473390080.

The previous prime is 65665016503. The next prime is 65665016569. The reversal of 65665016531 is 13561056656.

It is a happy number.

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 65665016531 - 2⁶ = 65665016467 is a prime.

It is a super-2 number, since 2×65665016531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65665016231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749555 + ... + 832563.

It is an arithmetic number, because the mean of its divisors is an integer number (8232101700).

Almost surely, 2^65665016531 is an apocalyptic number.

65665016531 is a deficient number, since it is larger than the sum of its proper divisors (191797069).

65665016531 is a wasteful number, since it uses less digits than its factorization.

65665016531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85309.

The product of its (nonzero) digits is 486000, while the sum is 44.

The spelling of 65665016531 in words is "sixty-five billion, six hundred sixty-five million, sixteen thousand, five hundred thirty-one".