7982877778 has 8 divisors (see below), whose sum is σ = 12604543920. Its totient is φ = 3781363140.

The previous prime is 7982877751. The next prime is 7982877779. The reversal of 7982877778 is 8777782897.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (7982877779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105037828 + ... + 105037903.

It is an arithmetic number, because the mean of its divisors is an integer number (1575567990).

Almost surely, 2^7982877778 is an apocalyptic number.

7982877778 is a deficient number, since it is larger than the sum of its proper divisors (4621666142).

7982877778 is a wasteful number, since it uses less digits than its factorization.

7982877778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210075752.

The product of its digits is 154893312, while the sum is 70.

The square root of 7982877778 is about 89346.9516995404. The cubic root of 7982877778 is about 1998.5721290015.

The spelling of 7982877778 in words is "seven billion, nine hundred eighty-two million, eight hundred seventy-seven thousand, seven hundred seventy-eight".