6643553466 has 16 divisors (see below), whose sum is σ = 14495025888. Its totient is φ = 2013198000.

The previous prime is 6643553461. The next prime is 6643553507.

6643553466 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6643553466² = 88273605311201226312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6643553461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50329885 + ... + 50330016.

It is an arithmetic number, because the mean of its divisors is an integer number (905939118).

Almost surely, 2^6643553466 is an apocalyptic number.

6643553466 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6643553466 is an abundant number, since it is smaller than the sum of its proper divisors (7851472422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6643553466 is a wasteful number, since it uses less digits than its factorization.

6643553466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100659917.

The product of its digits is 4665600, while the sum is 48.

The square root of 6643553466 is about 81507.9963316483. The cubic root of 6643553466 is about 1879.8945038508.

The spelling of 6643553466 in words is "six billion, six hundred forty-three million, five hundred fifty-three thousand, four hundred sixty-six".