6591420081 has 24 divisors (see below), whose sum is σ = 10088193024. Its totient is φ = 4132840320.

The previous prime is 6591420067. The next prime is 6591420119. The reversal of 6591420081 is 1800241956.

It is not a de Polignac number, because 6591420081 - 2⁵ = 6591420049 is a prime.

It is a super-4 number, since 4×6591420081⁴ (a number of 40 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6591420481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210420 + ... + 239706.

It is an arithmetic number, because the mean of its divisors is an integer number (420341376).

Almost surely, 2^6591420081 is an apocalyptic number.

It is an amenable number.

6591420081 is a deficient number, since it is larger than the sum of its proper divisors (3496772943).

6591420081 is a wasteful number, since it uses less digits than its factorization.

6591420081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30781 (or 30778 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 6591420081 is about 81187.5611223788. The cubic root of 6591420081 is about 1874.9642736659.

The spelling of 6591420081 in words is "six billion, five hundred ninety-one million, four hundred twenty thousand, eighty-one".