8066640278 has 4 divisors (see below), whose sum is σ = 12099960420. Its totient is φ = 4033320138.

The previous prime is 8066640277. The next prime is 8066640311. The reversal of 8066640278 is 8720466608.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8066640277) 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 as a sum of consecutive naturals, namely, 2016660068 + ... + 2016660071.

It is an arithmetic number, because the mean of its divisors is an integer number (3024990105).

Almost surely, 2^8066640278 is an apocalyptic number.

8066640278 is a deficient number, since it is larger than the sum of its proper divisors (4033320142).

8066640278 is a wasteful number, since it uses less digits than its factorization.

8066640278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4033320141.

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 8066640278 is about 89814.4769956381. The cubic root of 8066640278 is about 2005.5380075820.

The spelling of 8066640278 in words is "eight billion, sixty-six million, six hundred forty thousand, two hundred seventy-eight".