6657161217 has 24 divisors (see below), whose sum is σ = 10370534400. Its totient is φ = 3787461216.

The previous prime is 6657161213. The next prime is 6657161227. The reversal of 6657161217 is 7121617566.

It is not a de Polignac number, because 6657161217 - 2² = 6657161213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6657161213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65217 + ... + 132542.

It is an arithmetic number, because the mean of its divisors is an integer number (432105600).

Almost surely, 2^6657161217 is an apocalyptic number.

It is an amenable number.

6657161217 is a deficient number, since it is larger than the sum of its proper divisors (3713373183).

6657161217 is a wasteful number, since it uses less digits than its factorization.

6657161217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198005 (or 197998 counting only the distinct ones).

The product of its digits is 105840, while the sum is 42.

The square root of 6657161217 is about 81591.4285755557. The cubic root of 6657161217 is about 1881.1771352344.

The spelling of 6657161217 in words is "six billion, six hundred fifty-seven million, one hundred sixty-one thousand, two hundred seventeen".