6699999770 has 16 divisors (see below), whose sum is σ = 12287547720. Its totient is φ = 2629433664.

The previous prime is 6699999769. The next prime is 6699999781. The reversal of 6699999770 is 779999966.

It can be written as a sum of positive squares in 4 ways, for example, as 4299293761 + 2400706009 = 65569^2 + 48997^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6699999694 and 6699999703.

It is an unprimeable number.

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, 6320225 + ... + 6321284.

Almost surely, 2^6699999770 is an apocalyptic number.

6699999770 is a deficient number, since it is larger than the sum of its proper divisors (5587547950).

6699999770 is a wasteful number, since it uses less digits than its factorization.

6699999770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12641569.

The product of its (nonzero) digits is 104162436, while the sum is 71.

The square root of 6699999770 is about 81853.5263137759. The cubic root of 6699999770 is about 1885.2036094490.

The spelling of 6699999770 in words is "six billion, six hundred ninety-nine million, nine hundred ninety-nine thousand, seven hundred seventy".