3686997678 has 64 divisors (see below), whose sum is σ = 9105288192. Its totient is φ = 969223680.

The previous prime is 3686997661. The next prime is 3686997683. The reversal of 3686997678 is 8767996863.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158950 + ... + 180662.

It is an arithmetic number, because the mean of its divisors is an integer number (142270128).

Almost surely, 2^3686997678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3686997678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4552644096).

3686997678 is an abundant number, since it is smaller than the sum of its proper divisors (5418290514).

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

3686997678 is a wasteful number, since it uses less digits than its factorization.

3686997678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22049.

The product of its digits is 164602368, while the sum is 69.

The square root of 3686997678 is about 60720.6528126963. The cubic root of 3686997678 is about 1544.8664963559.

The spelling of 3686997678 in words is "three billion, six hundred eighty-six million, nine hundred ninety-seven thousand, six hundred seventy-eight".