6646850140 has 24 divisors (see below), whose sum is σ = 15952440672. Its totient is φ = 2278920000.

The previous prime is 6646850137. The next prime is 6646850153. The reversal of 6646850140 is 410586466.

It is a happy number.

It is a super-3 number, since 3×6646850140³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6646850093 and 6646850102.

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, 23738611 + ... + 23738890.

It is an arithmetic number, because the mean of its divisors is an integer number (664685028).

Almost surely, 2^6646850140 is an apocalyptic number.

It is an amenable number.

6646850140 is an abundant number, since it is smaller than the sum of its proper divisors (9305590532).

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

6646850140 is a wasteful number, since it uses less digits than its factorization.

6646850140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47477517 (or 47477515 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 6646850140 is about 81528.2168331922. The cubic root of 6646850140 is about 1880.2054004492.

The spelling of 6646850140 in words is "six billion, six hundred forty-six million, eight hundred fifty thousand, one hundred forty".