378880665 has 8 divisors (see below), whose sum is σ = 606209088. Its totient is φ = 202069680.

The previous prime is 378880661. The next prime is 378880727. The reversal of 378880665 is 566088873.

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

It is not a de Polignac number, because 378880665 - 2² = 378880661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (378880661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12629341 + ... + 12629370.

It is an arithmetic number, because the mean of its divisors is an integer number (75776136).

Almost surely, 2^378880665 is an apocalyptic number.

It is an amenable number.

378880665 is a deficient number, since it is larger than the sum of its proper divisors (227328423).

378880665 is a wasteful number, since it uses less digits than its factorization.

378880665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25258719.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The square root of 378880665 is about 19464.8571790291. The cubic root of 378880665 is about 723.6037590703.

The spelling of 378880665 in words is "three hundred seventy-eight million, eight hundred eighty thousand, six hundred sixty-five".