6716651779 has 4 divisors (see below), whose sum is σ = 6716864376. Its totient is φ = 6716439184.

The previous prime is 6716651743. The next prime is 6716651783. The reversal of 6716651779 is 9771566176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6716651779 - 2¹³ = 6716643587 is a prime.

It is a super-4 number, since 4×6716651779⁴ (a number of 40 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6716651719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48394 + ... + 125599.

It is an arithmetic number, because the mean of its divisors is an integer number (1679216094).

Almost surely, 2^6716651779 is an apocalyptic number.

6716651779 is a deficient number, since it is larger than the sum of its proper divisors (212597).

6716651779 is a wasteful number, since it uses less digits than its factorization.

6716651779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212596.

The product of its digits is 3333960, while the sum is 55.

The square root of 6716651779 is about 81955.1815262464. The cubic root of 6716651779 is about 1886.7641297020.

The spelling of 6716651779 in words is "six billion, seven hundred sixteen million, six hundred fifty-one thousand, seven hundred seventy-nine".