6578722081 has 4 divisors (see below), whose sum is σ = 6589930032. Its totient is φ = 6567514132.

The previous prime is 6578722079. The next prime is 6578722103. The reversal of 6578722081 is 1802278756.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6578722081 - 2¹ = 6578722079 is a prime.

It is a super-2 number, since 2×6578722081² = 86559168438073941122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6578722481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5603095 + ... + 5604268.

It is an arithmetic number, because the mean of its divisors is an integer number (1647482508).

Almost surely, 2^6578722081 is an apocalyptic number.

It is an amenable number.

6578722081 is a deficient number, since it is larger than the sum of its proper divisors (11207951).

6578722081 is a wasteful number, since it uses less digits than its factorization.

6578722081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11207950.

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 6578722081 is about 81109.3217885589. The cubic root of 6578722081 is about 1873.7594952881.

The spelling of 6578722081 in words is "six billion, five hundred seventy-eight million, seven hundred twenty-two thousand, eighty-one".