6660116601657 has 8 divisors (see below), whose sum is σ = 8880221093184. Its totient is φ = 4440044922288.

The previous prime is 6660116601581. The next prime is 6660116601673. The reversal of 6660116601657 is 7561066110666.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6660116601657 - 2¹⁴ = 6660116585273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6660116641657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7725453 + ... + 8544170.

It is an arithmetic number, because the mean of its divisors is an integer number (1110027636648).

Almost surely, 2^{6660116601657} is an apocalyptic number.

It is an amenable number.

6660116601657 is a deficient number, since it is larger than the sum of its proper divisors (2220104491527).

6660116601657 is a wasteful number, since it uses less digits than its factorization.

6660116601657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16406079.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 6660116601657 in words is "six trillion, six hundred sixty billion, one hundred sixteen million, six hundred one thousand, six hundred fifty-seven".