6771979973 has 4 divisors (see below), whose sum is σ = 7387614528. Its totient is φ = 6156345420.

The previous prime is 6771979969. The next prime is 6771979987. The reversal of 6771979973 is 3799791776.

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 a cyclic number.

It is not a de Polignac number, because 6771979973 - 2² = 6771979969 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 (6771979073) 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, 307817261 + ... + 307817282.

It is an arithmetic number, because the mean of its divisors is an integer number (1846903632).

Almost surely, 2^6771979973 is an apocalyptic number.

It is an amenable number.

6771979973 is a deficient number, since it is larger than the sum of its proper divisors (615634555).

6771979973 is a wasteful number, since it uses less digits than its factorization.

6771979973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615634554.

The product of its digits is 31505922, while the sum is 65.

The square root of 6771979973 is about 82292.0407633691. The cubic root of 6771979973 is about 1891.9306878832.

The spelling of 6771979973 in words is "six billion, seven hundred seventy-one million, nine hundred seventy-nine thousand, nine hundred seventy-three".