6772544021 has 4 divisors (see below), whose sum is σ = 6775056000. Its totient is φ = 6770032044.

The previous prime is 6772544003. The next prime is 6772544027. The reversal of 6772544021 is 1204452776.

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 6772544021 - 2⁶ = 6772543957 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 (6772544027) 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, 1251941 + ... + 1257338.

It is an arithmetic number, because the mean of its divisors is an integer number (1693764000).

Almost surely, 2^6772544021 is an apocalyptic number.

It is an amenable number.

6772544021 is a deficient number, since it is larger than the sum of its proper divisors (2511979).

6772544021 is a wasteful number, since it uses less digits than its factorization.

6772544021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511978.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 6772544021 is about 82295.4678035188. The cubic root of 6772544021 is about 1891.9832136387.

Adding to 6772544021 its reverse (1204452776), we get a palindrome (7976996797).

The spelling of 6772544021 in words is "six billion, seven hundred seventy-two million, five hundred forty-four thousand, twenty-one".