6669498889 has 3 divisors (see below), whose sum is σ = 6669580557. Its totient is φ = 6669417222.

The previous prime is 6669498881. The next prime is 6669498911. The reversal of 6669498889 is 9888949666.

The square root of 6669498889 is 81667.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 6669498889 - 2³ = 6669498881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6669498881) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 40834 + ... + 122500.

It is an arithmetic number, because the mean of its divisors is an integer number (2223193519).

Almost surely, 2^6669498889 is an apocalyptic number.

6669498889 is the 81667-th square number.

6669498889 is the 40834-th centered octagonal number.

It is an amenable number.

6669498889 is a deficient number, since it is larger than the sum of its proper divisors (81668).

6669498889 is an frugal number, since it uses more digits than its factorization.

6669498889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163334 (or 81667 counting only the distinct ones).

The product of its digits is 322486272, while the sum is 73.

The cubic root of 6669498889 is about 1882.3385423542.

The spelling of 6669498889 in words is "six billion, six hundred sixty-nine million, four hundred ninety-eight thousand, eight hundred eighty-nine".