6721532755 has 16 divisors (see below), whose sum is σ = 9224490240. Its totient is φ = 4605856992.

The previous prime is 6721532749. The next prime is 6721532773. The reversal of 6721532755 is 5572351276.

It is a cyclic number.

It is not a de Polignac number, because 6721532755 - 2⁵ = 6721532723 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14749 + ... + 116878.

It is an arithmetic number, because the mean of its divisors is an integer number (576530640).

Almost surely, 2^6721532755 is an apocalyptic number.

6721532755 is a deficient number, since it is larger than the sum of its proper divisors (2502957485).

6721532755 is a wasteful number, since it uses less digits than its factorization.

6721532755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133098.

The product of its digits is 441000, while the sum is 43.

The square root of 6721532755 is about 81984.9544428732. The cubic root of 6721532755 is about 1887.2210548118.

The spelling of 6721532755 in words is "six billion, seven hundred twenty-one million, five hundred thirty-two thousand, seven hundred fifty-five".