6645492212 has 24 divisors (see below), whose sum is σ = 12773947200. Its totient is φ = 3011000256.

The previous prime is 6645492179. The next prime is 6645492229. The reversal of 6645492212 is 2122945466.

It is a super-4 number, since 4×6645492212⁴ (a number of 40 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6645492212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1899137 + ... + 1902632.

It is an arithmetic number, because the mean of its divisors is an integer number (532247800).

Almost surely, 2^6645492212 is an apocalyptic number.

It is an amenable number.

6645492212 is a deficient number, since it is larger than the sum of its proper divisors (6128454988).

6645492212 is a wasteful number, since it uses less digits than its factorization.

6645492212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3801815 (or 3801813 counting only the distinct ones).

The product of its digits is 207360, while the sum is 41.

The square root of 6645492212 is about 81519.8884444772. Note that the first 3 decimals coincide. The cubic root of 6645492212 is about 1880.0773519554.

The spelling of 6645492212 in words is "six billion, six hundred forty-five million, four hundred ninety-two thousand, two hundred twelve".