1670538686717 has 4 divisors (see below), whose sum is σ = 1670677482396. Its totient is φ = 1670399891040.

The previous prime is 1670538686689. The next prime is 1670538686753. The reversal of 1670538686717 is 7176868350761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 336758535481 + 1333780151236 = 580309^2 + 1154894^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670538686717 - 2¹⁶ = 1670538621181 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 (1670538686797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69379784 + ... + 69403857.

It is an arithmetic number, because the mean of its divisors is an integer number (417669370599).

Almost surely, 2^{1670538686717} is an apocalyptic number.

It is an amenable number.

1670538686717 is a deficient number, since it is larger than the sum of its proper divisors (138795679).

1670538686717 is a wasteful number, since it uses less digits than its factorization.

1670538686717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138795678.

The product of its (nonzero) digits is 71124480, while the sum is 65.

The spelling of 1670538686717 in words is "one trillion, six hundred seventy billion, five hundred thirty-eight million, six hundred eighty-six thousand, seven hundred seventeen".