7858165065 has 32 divisors (see below), whose sum is σ = 13358545920. Its totient is φ = 3933319104.

The previous prime is 7858165057. The next prime is 7858165069. The reversal of 7858165065 is 5605618587.

It is not a de Polignac number, because 7858165065 - 2³ = 7858165057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7858164999 and 7858165017.

It is not an unprimeable number, because it can be changed into a prime (7858165069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98349 + ... + 159338.

It is an arithmetic number, because the mean of its divisors is an integer number (417454560).

Almost surely, 2^7858165065 is an apocalyptic number.

It is an amenable number.

7858165065 is a deficient number, since it is larger than the sum of its proper divisors (5500380855).

7858165065 is a wasteful number, since it uses less digits than its factorization.

7858165065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257821.

The product of its (nonzero) digits is 2016000, while the sum is 51.

The square root of 7858165065 is about 88646.2918852221. The cubic root of 7858165065 is about 1988.1098746232.

The spelling of 7858165065 in words is "seven billion, eight hundred fifty-eight million, one hundred sixty-five thousand, sixty-five".