6620642140 has 48 divisors (see below), whose sum is σ = 15937657344. Its totient is φ = 2263060800.

The previous prime is 6620642123. The next prime is 6620642153. The reversal of 6620642140 is 412460266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25096 + ... + 117775.

It is an arithmetic number, because the mean of its divisors is an integer number (332034528).

Almost surely, 2^6620642140 is an apocalyptic number.

It is an amenable number.

6620642140 is an abundant number, since it is smaller than the sum of its proper divisors (9317015204).

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

6620642140 is a wasteful number, since it uses less digits than its factorization.

6620642140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143218 (or 143216 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 6620642140 is about 81367.3284555908. The cubic root of 6620642140 is about 1877.7309787973.

The spelling of 6620642140 in words is "six billion, six hundred twenty million, six hundred forty-two thousand, one hundred forty".