6621536451 has 8 divisors (see below), whose sum is σ = 8829417664. Its totient is φ = 4414006440.

The previous prime is 6621536407. The next prime is 6621536459. The reversal of 6621536451 is 1546351266.

6621536451 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6621536451 - 2⁹ = 6621535939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6621536459) 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, 40105 + ... + 121866.

It is an arithmetic number, because the mean of its divisors is an integer number (1103677208).

Almost surely, 2^6621536451 is an apocalyptic number.

6621536451 is a deficient number, since it is larger than the sum of its proper divisors (2207881213).

6621536451 is a wasteful number, since it uses less digits than its factorization.

6621536451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175601.

The product of its digits is 129600, while the sum is 39.

The square root of 6621536451 is about 81372.8237865689. The cubic root of 6621536451 is about 1877.8155224527.

The spelling of 6621536451 in words is "six billion, six hundred twenty-one million, five hundred thirty-six thousand, four hundred fifty-one".