6754216621 has 4 divisors (see below), whose sum is σ = 6754640032. Its totient is φ = 6753793212.

The previous prime is 6754216589. The next prime is 6754216649. The reversal of 6754216621 is 1266124576.

It is a happy number.

6754216621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6754216621 - 2⁵ = 6754216589 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 (6754216661) 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, 186801 + ... + 220006.

It is an arithmetic number, because the mean of its divisors is an integer number (1688660008).

Almost surely, 2^6754216621 is an apocalyptic number.

It is an amenable number.

6754216621 is a deficient number, since it is larger than the sum of its proper divisors (423411).

6754216621 is a wasteful number, since it uses less digits than its factorization.

6754216621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423410.

The product of its digits is 120960, while the sum is 40.

The square root of 6754216621 is about 82184.0411576360. The cubic root of 6754216621 is about 1890.2750195613.

The spelling of 6754216621 in words is "six billion, seven hundred fifty-four million, two hundred sixteen thousand, six hundred twenty-one".