6501065021 has 8 divisors (see below), whose sum is σ = 7131693600. Its totient is φ = 5877040240.

The previous prime is 6501064981. The next prime is 6501065027. The reversal of 6501065021 is 1205601056.

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 6501065021 - 2¹⁴ = 6501048637 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 (6501065027) 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, 1648886 + ... + 1652823.

It is an arithmetic number, because the mean of its divisors is an integer number (891461700).

Almost surely, 2^6501065021 is an apocalyptic number.

It is an amenable number.

6501065021 is a deficient number, since it is larger than the sum of its proper divisors (630628579).

6501065021 is a wasteful number, since it uses less digits than its factorization.

6501065021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301899.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 6501065021 is about 80629.1821923055. The cubic root of 6501065021 is about 1866.3575011182.

Adding to 6501065021 its reverse (1205601056), we get a palindrome (7706666077).

It can be divided in two parts, 65010 and 65021, that added together give a palindrome (130031).

The spelling of 6501065021 in words is "six billion, five hundred one million, sixty-five thousand, twenty-one".