8378661 has 8 divisors (see below), whose sum is σ = 11313280. Its totient is φ = 5514912.

The previous prime is 8378659. The next prime is 8378681. The reversal of 8378661 is 1668738.

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

It is not a de Polignac number, because 8378661 - 2¹ = 8378659 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 (8378621) 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, 17440 + ... + 17913.

It is an arithmetic number, because the mean of its divisors is an integer number (1414160).

Almost surely, 2^8378661 is an apocalyptic number.

It is an amenable number.

8378661 is a deficient number, since it is larger than the sum of its proper divisors (2934619).

8378661 is a wasteful number, since it uses less digits than its factorization.

8378661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35435.

The product of its digits is 48384, while the sum is 39.

The square root of 8378661 is about 2894.5916810493. The cubic root of 8378661 is about 203.1069914133.

The spelling of 8378661 in words is "eight million, three hundred seventy-eight thousand, six hundred sixty-one".