6711620665 has 16 divisors (see below), whose sum is σ = 8257769856. Its totient is φ = 5233648000.

The previous prime is 6711620659. The next prime is 6711620693. The reversal of 6711620665 is 5660261176.

It is a de Polignac number, because none of the positive numbers 2^k-6711620665 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224340 + ... + 252490.

It is an arithmetic number, because the mean of its divisors is an integer number (516110616).

Almost surely, 2^6711620665 is an apocalyptic number.

It is an amenable number.

6711620665 is a deficient number, since it is larger than the sum of its proper divisors (1546149191).

6711620665 is a wasteful number, since it uses less digits than its factorization.

6711620665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29360.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 6711620665 is about 81924.4814753197. The cubic root of 6711620665 is about 1886.2929179110.

The spelling of 6711620665 in words is "six billion, seven hundred eleven million, six hundred twenty thousand, six hundred sixty-five".