1667685117 has 8 divisors (see below), whose sum is σ = 2541234496. Its totient is φ = 952962912.

The previous prime is 1667685113. The next prime is 1667685139. The reversal of 1667685117 is 7115867661.

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

It is not a de Polignac number, because 1667685117 - 2² = 1667685113 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667685113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39706768 + ... + 39706809.

It is an arithmetic number, because the mean of its divisors is an integer number (317654312).

Almost surely, 2^1667685117 is an apocalyptic number.

It is an amenable number.

1667685117 is a deficient number, since it is larger than the sum of its proper divisors (873549379).

1667685117 is an equidigital number, since it uses as much as digits as its factorization.

1667685117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79413587.

The product of its digits is 423360, while the sum is 48.

The square root of 1667685117 is about 40837.3005596599. The cubic root of 1667685117 is about 1185.8725536001.

The spelling of 1667685117 in words is "one billion, six hundred sixty-seven million, six hundred eighty-five thousand, one hundred seventeen".