6578669881 has 9 divisors (see below), whose sum is σ = 7653398949. Its totient is φ = 5638373244.

The previous prime is 6578669863. The next prime is 6578669963. The reversal of 6578669881 is 1889668756.

The square root of 6578669881 is 81109.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 6578669881 - 2⁵ = 6578669849 is a prime.

It is a super-2 number, since 2×6578669881² = 86557794806353108322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6578669831) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 561970 + ... + 573556.

It is an arithmetic number, because the mean of its divisors is an integer number (850377661).

Almost surely, 2^6578669881 is an apocalyptic number.

6578669881 is the 81109-th square number.

6578669881 is the 40555-th centered octagonal number.

It is an amenable number.

6578669881 is a deficient number, since it is larger than the sum of its proper divisors (1074729068).

6578669881 is an frugal number, since it uses more digits than its factorization.

6578669881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23188 (or 11594 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 64.

The cubic root of 6578669881 is about 1873.7545393862.

Multiplying 6578669881 by its sum of digits (64), we get a square (421034872384 = 648872²).

The spelling of 6578669881 in words is "six billion, five hundred seventy-eight million, six hundred sixty-nine thousand, eight hundred eighty-one".