678130665 has 16 divisors (see below), whose sum is σ = 1095754176. Its totient is φ = 358088000.

The previous prime is 678130639. The next prime is 678130771. The reversal of 678130665 is 566031876.

It is not a de Polignac number, because 678130665 - 2⁵ = 678130633 is a prime.

It is a super-2 number, since 2×678130665² = 919722397626684450, which contains 22 as substring.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 222291 + ... + 225320.

It is an arithmetic number, because the mean of its divisors is an integer number (68484636).

Almost surely, 2^678130665 is an apocalyptic number.

It is an amenable number.

678130665 is a deficient number, since it is larger than the sum of its proper divisors (417623511).

678130665 is a wasteful number, since it uses less digits than its factorization.

678130665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447720.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 678130665 is about 26040.9420912532. The cubic root of 678130665 is about 878.5593961318.

The spelling of 678130665 in words is "six hundred seventy-eight million, one hundred thirty thousand, six hundred sixty-five".