6655917840 has 160 divisors (see below), whose sum is σ = 24240698496. Its totient is φ = 1489428480.

The previous prime is 6655917811. The next prime is 6655917857. The reversal of 6655917840 is 487195566.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62649 + ... + 131288.

Almost surely, 2^6655917840 is an apocalyptic number.

6655917840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6655917840 is an abundant number, since it is smaller than the sum of its proper divisors (17584780656).

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

6655917840 is a wasteful number, since it uses less digits than its factorization.

6655917840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193977 (or 193971 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 51.

The square root of 6655917840 is about 81583.8086877537. The cubic root of 6655917840 is about 1881.0600103347.

The spelling of 6655917840 in words is "six billion, six hundred fifty-five million, nine hundred seventeen thousand, eight hundred forty".