7736521668 has 48 divisors (see below), whose sum is σ = 18449485824. Its totient is φ = 2522121120.

The previous prime is 7736521643. The next prime is 7736521679. The reversal of 7736521668 is 8661256377.

It is a self number, because there is not a number n which added to its sum of digits gives 7736521668.

It is an unprimeable number.

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, 913413 + ... + 921843.

It is an arithmetic number, because the mean of its divisors is an integer number (384364288).

Almost surely, 2^7736521668 is an apocalyptic number.

It is an amenable number.

7736521668 is an abundant number, since it is smaller than the sum of its proper divisors (10712964156).

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

7736521668 is a wasteful number, since it uses less digits than its factorization.

7736521668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10112 (or 10110 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 51.

The square root of 7736521668 is about 87957.4992141091. The cubic root of 7736521668 is about 1977.7979181241.

The spelling of 7736521668 in words is "seven billion, seven hundred thirty-six million, five hundred twenty-one thousand, six hundred sixty-eight".