6645013210 has 128 divisors (see below), whose sum is σ = 14105415168. Its totient is φ = 2227200000.

The previous prime is 6645013183. The next prime is 6645013231. The reversal of 6645013210 is 123105466.

It is a super-2 number, since 2×6645013210² = 88312401122149008200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28519254 + ... + 28519486.

It is an arithmetic number, because the mean of its divisors is an integer number (110198556).

Almost surely, 2^6645013210 is an apocalyptic number.

6645013210 is an abundant number, since it is smaller than the sum of its proper divisors (7460401958).

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

6645013210 is a wasteful number, since it uses less digits than its factorization.

6645013210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 6645013210 is about 81516.9504459042. The cubic root of 6645013210 is about 1880.0321793571.

Adding to 6645013210 its reverse (123105466), we get a palindrome (6768118676).

The spelling of 6645013210 in words is "six billion, six hundred forty-five million, thirteen thousand, two hundred ten".