6621053669 has 4 divisors (see below), whose sum is σ = 6622022496. Its totient is φ = 6620084844.

The previous prime is 6621053641. The next prime is 6621053693. The reversal of 6621053669 is 9663501266.

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 6621053669 - 2²⁴ = 6604276453 is a prime.

It is a super-2 number, since 2×6621053669² = 87676703375556723122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6621053609) 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, 474089 + ... + 487854.

It is an arithmetic number, because the mean of its divisors is an integer number (1655505624).

Almost surely, 2^6621053669 is an apocalyptic number.

It is an amenable number.

6621053669 is a deficient number, since it is larger than the sum of its proper divisors (968827).

6621053669 is an equidigital number, since it uses as much as digits as its factorization.

6621053669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968826.

The product of its (nonzero) digits is 349920, while the sum is 44.

The square root of 6621053669 is about 81369.8572507043. The cubic root of 6621053669 is about 1877.7698836208.

The spelling of 6621053669 in words is "six billion, six hundred twenty-one million, fifty-three thousand, six hundred sixty-nine".