6650872440 has 32 divisors (see below), whose sum is σ = 19952617680. Its totient is φ = 1773565952.

The previous prime is 6650872411. The next prime is 6650872453. The reversal of 6650872440 is 442780566.

It is a junction number, because it is equal to n+sod(n) for n = 6650872392 and 6650872401.

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, 27711849 + ... + 27712088.

Almost surely, 2^6650872440 is an apocalyptic number.

6650872440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6650872440 is an abundant number, since it is smaller than the sum of its proper divisors (13301745240).

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

6650872440 is a wasteful number, since it uses less digits than its factorization.

6650872440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55423951 (or 55423947 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 6650872440 is about 81552.8812489173. The cubic root of 6650872440 is about 1880.5845888377.

The spelling of 6650872440 in words is "six billion, six hundred fifty million, eight hundred seventy-two thousand, four hundred forty".