6966721677 has 4 divisors (see below), whose sum is σ = 9288962240. Its totient is φ = 4644481116.

The previous prime is 6966721673. The next prime is 6966721679. The reversal of 6966721677 is 7761276696.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6966721677 - 2² = 6966721673 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6966721673) 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, 1161120277 + ... + 1161120282.

It is an arithmetic number, because the mean of its divisors is an integer number (2322240560).

Almost surely, 2^6966721677 is an apocalyptic number.

It is an amenable number.

6966721677 is a deficient number, since it is larger than the sum of its proper divisors (2322240563).

6966721677 is a wasteful number, since it uses less digits than its factorization.

6966721677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2322240562.

The product of its digits is 8001504, while the sum is 57.

The square root of 6966721677 is about 83466.8897048404. The cubic root of 6966721677 is about 1909.8949785552.

The spelling of 6966721677 in words is "six billion, nine hundred sixty-six million, seven hundred twenty-one thousand, six hundred seventy-seven".