3658786678 has 4 divisors (see below), whose sum is σ = 5488180020. Its totient is φ = 1829393338.

The previous prime is 3658786673. The next prime is 3658786693. The reversal of 3658786678 is 8766878563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8766878563 = 17 ⋅515698739.

It is a super-2 number, since 2×3658786678² = 26773439910220551368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3658786673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 914696668 + ... + 914696671.

It is an arithmetic number, because the mean of its divisors is an integer number (1372045005).

Almost surely, 2^3658786678 is an apocalyptic number.

3658786678 is a deficient number, since it is larger than the sum of its proper divisors (1829393342).

3658786678 is a wasteful number, since it uses less digits than its factorization.

3658786678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829393341.

The product of its digits is 81285120, while the sum is 64.

The square root of 3658786678 is about 60487.9052207960. The cubic root of 3658786678 is about 1540.9162307919.

The spelling of 3658786678 in words is "three billion, six hundred fifty-eight million, seven hundred eighty-six thousand, six hundred seventy-eight".