3658605678 has 384 divisors, whose sum is σ = 10884464640. Its totient is φ = 901393920.

The previous prime is 3658605673. The next prime is 3658605707. The reversal of 3658605678 is 8765068563.

3658605678 is a `hidden beast` number, since 3 + 6 + 586 + 0 + 56 + 7 + 8 = 666.

3658605678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3658605673) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 50117850 + ... + 50117922.

It is an arithmetic number, because the mean of its divisors is an integer number (28344960).

Almost surely, 2^3658605678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3658605678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5442232320).

3658605678 is an abundant number, since it is smaller than the sum of its proper divisors (7225858962).

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

3658605678 is a wasteful number, since it uses less digits than its factorization.

3658605678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The square root of 3658605678 is about 60486.4090354189. The cubic root of 3658605678 is about 1540.8908206891.

The spelling of 3658605678 in words is "three billion, six hundred fifty-eight million, six hundred five thousand, six hundred seventy-eight".