6669911954 has 16 divisors (see below), whose sum is σ = 10594913400. Its totient is φ = 3138330624.

The previous prime is 6669911921. The next prime is 6669911957. The reversal of 6669911954 is 4591199666.

It can be written as a sum of positive squares in 4 ways, for example, as 2891965729 + 3777946225 = 53777^2 + 61465^2 .

It is a super-2 number, since 2×6669911954² = 88975450948224196232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6669911954.

It is not an unprimeable number, because it can be changed into a prime (6669911957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414002 + ... + 429810.

Almost surely, 2^6669911954 is an apocalyptic number.

6669911954 is a deficient number, since it is larger than the sum of its proper divisors (3925001446).

6669911954 is a wasteful number, since it uses less digits than its factorization.

6669911954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28237.

The product of its digits is 3149280, while the sum is 56.

The square root of 6669911954 is about 81669.5289199099. The cubic root of 6669911954 is about 1882.3774014515.

The spelling of 6669911954 in words is "six billion, six hundred sixty-nine million, nine hundred eleven thousand, nine hundred fifty-four".