6716647552778 has 16 divisors (see below), whose sum is σ = 10255362218376. Its totient is φ = 3298575260160.

The previous prime is 6716647552751. The next prime is 6716647552789. The reversal of 6716647552778 is 8772557466176.

It can be written as a sum of positive squares in 4 ways, for example, as 5974832256409 + 741815296369 = 2444347^2 + 861287^2 .

It is a super-2 number, since 2×6716647552778² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95409701 + ... + 95480072.

Almost surely, 2^{6716647552778} is an apocalyptic number.

6716647552778 is a deficient number, since it is larger than the sum of its proper divisors (3538714665598).

6716647552778 is a wasteful number, since it uses less digits than its factorization.

6716647552778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190890089.

The product of its digits is 829785600, while the sum is 71.

The spelling of 6716647552778 in words is "six trillion, seven hundred sixteen billion, six hundred forty-seven million, five hundred fifty-two thousand, seven hundred seventy-eight".