6645005467 has 4 divisors (see below), whose sum is σ = 6713510776. Its totient is φ = 6576500160.

The previous prime is 6645005461. The next prime is 6645005501. The reversal of 6645005467 is 7645005466.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6645005467 - 2²⁷ = 6510787739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6645005461) 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, 34252509 + ... + 34252702.

It is an arithmetic number, because the mean of its divisors is an integer number (1678377694).

Almost surely, 2^6645005467 is an apocalyptic number.

6645005467 is a deficient number, since it is larger than the sum of its proper divisors (68505309).

6645005467 is an equidigital number, since it uses as much as digits as its factorization.

6645005467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68505308.

The product of its (nonzero) digits is 604800, while the sum is 43.

The square root of 6645005467 is about 81516.9029527006. The cubic root of 6645005467 is about 1880.0314491306.

Subtracting 6645005467 from its reverse (7645005466), we obtain a palindrome (999999999).

The spelling of 6645005467 in words is "six billion, six hundred forty-five million, five thousand, four hundred sixty-seven".