3668278687 has 4 divisors (see below), whose sum is σ = 3719944656. Its totient is φ = 3616612720.

The previous prime is 3668278661. The next prime is 3668278693. The reversal of 3668278687 is 7868728663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7868728663 = 20063 ⋅392201.

It is a cyclic number.

It is not a de Polignac number, because 3668278687 - 2²³ = 3659890079 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 (3668278387) 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, 25832878 + ... + 25833019.

It is an arithmetic number, because the mean of its divisors is an integer number (929986164).

Almost surely, 2^3668278687 is an apocalyptic number.

3668278687 is a deficient number, since it is larger than the sum of its proper divisors (51665969).

3668278687 is an equidigital number, since it uses as much as digits as its factorization.

3668278687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51665968.

The product of its digits is 32514048, while the sum is 61.

The square root of 3668278687 is about 60566.3164390901. The cubic root of 3668278687 is about 1542.2476157359.

The spelling of 3668278687 in words is "three billion, six hundred sixty-eight million, two hundred seventy-eight thousand, six hundred eighty-seven".