7865665001 has 8 divisors (see below), whose sum is σ = 7885764864. Its totient is φ = 7845591600.

The previous prime is 7865664953. The next prime is 7865665007. The reversal of 7865665001 is 1005665687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7865665001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7865665007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675176 + ... + 686726.

It is an arithmetic number, because the mean of its divisors is an integer number (985720608).

Almost surely, 2^7865665001 is an apocalyptic number.

It is an amenable number.

7865665001 is a deficient number, since it is larger than the sum of its proper divisors (20099863).

7865665001 is a wasteful number, since it uses less digits than its factorization.

7865665001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13231.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 7865665001 is about 88688.5843894241. The cubic root of 7865665001 is about 1988.7421662399.

The spelling of 7865665001 in words is "seven billion, eight hundred sixty-five million, six hundred sixty-five thousand, one".