7991667528 has 64 divisors (see below), whose sum is σ = 21880756800. Its totient is φ = 2417291520.

The previous prime is 7991667527. The next prime is 7991667569. The reversal of 7991667528 is 8257661997.

It is not an unprimeable number, because it can be changed into a prime (7991667527) 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 in 15 ways as a sum of consecutive naturals, for example, 198663 + ... + 235478.

It is an arithmetic number, because the mean of its divisors is an integer number (341886825).

Almost surely, 2^7991667528 is an apocalyptic number.

7991667528 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

7991667528 is an abundant number, since it is smaller than the sum of its proper divisors (13889089272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7991667528 is a wasteful number, since it uses less digits than its factorization.

7991667528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434222 (or 434218 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 60.

The square root of 7991667528 is about 89396.1270302019. The cubic root of 7991667528 is about 1999.3053861170.

The spelling of 7991667528 in words is "seven billion, nine hundred ninety-one million, six hundred sixty-seven thousand, five hundred twenty-eight".