7977684422 has 4 divisors (see below), whose sum is σ = 11966526636. Its totient is φ = 3988842210.

The previous prime is 7977684419. The next prime is 7977684427. The reversal of 7977684422 is 2244867797.

It is a happy number.

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 (7977684427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994421104 + ... + 1994421107.

It is an arithmetic number, because the mean of its divisors is an integer number (2991631659).

Almost surely, 2^7977684422 is an apocalyptic number.

7977684422 is a deficient number, since it is larger than the sum of its proper divisors (3988842214).

7977684422 is a wasteful number, since it uses less digits than its factorization.

7977684422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988842213.

The product of its digits is 9483264, while the sum is 56.

The square root of 7977684422 is about 89317.8841106304. The cubic root of 7977684422 is about 1998.1386367008.

The spelling of 7977684422 in words is "seven billion, nine hundred seventy-seven million, six hundred eighty-four thousand, four hundred twenty-two".