6721453753 has 8 divisors (see below), whose sum is σ = 7714631808. Its totient is φ = 5736518304.

The previous prime is 6721453751. The next prime is 6721453769. The reversal of 6721453753 is 3573541276.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6721453753 - 2¹ = 6721453751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6721453751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2058901 + ... + 2062162.

It is an arithmetic number, because the mean of its divisors is an integer number (964328976).

Almost surely, 2^6721453753 is an apocalyptic number.

It is an amenable number.

6721453753 is a deficient number, since it is larger than the sum of its proper divisors (993178055).

6721453753 is a wasteful number, since it uses less digits than its factorization.

6721453753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4121303.

The product of its digits is 529200, while the sum is 43.

The square root of 6721453753 is about 81984.4726335420. The cubic root of 6721453753 is about 1887.2136609217.

The spelling of 6721453753 in words is "six billion, seven hundred twenty-one million, four hundred fifty-three thousand, seven hundred fifty-three".