6646313280 has 56 divisors (see below), whose sum is σ = 21102047712. Its totient is φ = 1772349952.

The previous prime is 6646313279. The next prime is 6646313281. The reversal of 6646313280 is 823136466.

It is an interprime number because it is at equal distance from previous prime (6646313279) and next prime (6646313281).

It is a super-3 number, since 3×6646313280³ (a number of 30 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646313281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3460662 + ... + 3462581.

Almost surely, 2^6646313280 is an apocalyptic number.

6646313280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6646313280 is an abundant number, since it is smaller than the sum of its proper divisors (14455734432).

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

6646313280 is a wasteful number, since it uses less digits than its factorization.

6646313280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6923263 (or 6923253 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 6646313280 is about 81524.9242869934. The cubic root of 6646313280 is about 1880.1547782634.

The spelling of 6646313280 in words is "six billion, six hundred forty-six million, three hundred thirteen thousand, two hundred eighty".