65660865007 has 8 divisors (see below), whose sum is σ = 67074492672. Its totient is φ = 64247928600.

The previous prime is 65660864999. The next prime is 65660865073. The reversal of 65660865007 is 70056806656.

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 65660865007 - 2³ = 65660864999 is a prime.

It is a super-2 number, since 2×65660865007² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65660065007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21532 + ... + 363022.

It is an arithmetic number, because the mean of its divisors is an integer number (8384311584).

Almost surely, 2^65660865007 is an apocalyptic number.

65660865007 is a deficient number, since it is larger than the sum of its proper divisors (1413627665).

65660865007 is a wasteful number, since it uses less digits than its factorization.

65660865007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345629.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 65660865007 in words is "sixty-five billion, six hundred sixty million, eight hundred sixty-five thousand, seven".