6621132715 has 16 divisors (see below), whose sum is σ = 8491368672. Its totient is φ = 4938724864.

The previous prime is 6621132701. The next prime is 6621132769. The reversal of 6621132715 is 5172311266.

It is a cyclic number.

It is not a de Polignac number, because 6621132715 - 2⁷ = 6621132587 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354904 + ... + 373093.

It is an arithmetic number, because the mean of its divisors is an integer number (530710542).

Almost surely, 2^6621132715 is an apocalyptic number.

6621132715 is a deficient number, since it is larger than the sum of its proper divisors (1870235957).

6621132715 is a wasteful number, since it uses less digits than its factorization.

6621132715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728126.

The product of its digits is 15120, while the sum is 34.

The square root of 6621132715 is about 81370.3429696594. The cubic root of 6621132715 is about 1877.7773562284. Note that the first 3 decimals are identical.

The spelling of 6621132715 in words is "six billion, six hundred twenty-one million, one hundred thirty-two thousand, seven hundred fifteen".