6661477286 has 4 divisors (see below), whose sum is σ = 9992215932. Its totient is φ = 3330738642.

The previous prime is 6661477271. The next prime is 6661477289. The reversal of 6661477286 is 6827741666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6827741666 = 2 ⋅3413870833.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661477289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1665369320 + ... + 1665369323.

It is an arithmetic number, because the mean of its divisors is an integer number (2498053983).

Almost surely, 2^6661477286 is an apocalyptic number.

6661477286 is a deficient number, since it is larger than the sum of its proper divisors (3330738646).

6661477286 is a wasteful number, since it uses less digits than its factorization.

6661477286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330738645.

The product of its digits is 4064256, while the sum is 53.

The square root of 6661477286 is about 81617.8735694578. The cubic root of 6661477286 is about 1881.5835915808.

The spelling of 6661477286 in words is "six billion, six hundred sixty-one million, four hundred seventy-seven thousand, two hundred eighty-six".