3781678663 has 8 divisors (see below), whose sum is σ = 4364710560. Its totient is φ = 3209344800.

The previous prime is 3781678651. The next prime is 3781678673. The reversal of 3781678663 is 3668761873.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3781678663 - 2²⁵ = 3748124231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781678613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2673748 + ... + 2675161.

It is an arithmetic number, because the mean of its divisors is an integer number (545588820).

Almost surely, 2^3781678663 is an apocalyptic number.

3781678663 is a deficient number, since it is larger than the sum of its proper divisors (583031897).

3781678663 is a wasteful number, since it uses less digits than its factorization.

3781678663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5349017.

The product of its digits is 6096384, while the sum is 55.

The square root of 3781678663 is about 61495.3548083105. The cubic root of 3781678663 is about 1557.9787902841.

The spelling of 3781678663 in words is "three billion, seven hundred eighty-one million, six hundred seventy-eight thousand, six hundred sixty-three".