678842507 has 16 divisors (see below), whose sum is σ = 818112000. Its totient is φ = 550255680.

The previous prime is 678842477. The next prime is 678842509. The reversal of 678842507 is 705248876.

It is a cyclic number.

It is not a de Polignac number, because 678842507 - 2⁶ = 678842443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678842509) 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 15 ways as a sum of consecutive naturals, for example, 75407 + ... + 83927.

It is an arithmetic number, because the mean of its divisors is an integer number (51132000).

Almost surely, 2^678842507 is an apocalyptic number.

678842507 is a deficient number, since it is larger than the sum of its proper divisors (139269493).

678842507 is a wasteful number, since it uses less digits than its factorization.

678842507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9146.

The product of its (nonzero) digits is 752640, while the sum is 47.

The square root of 678842507 is about 26054.6062530217. The cubic root of 678842507 is about 878.8667001216.

The spelling of 678842507 in words is "six hundred seventy-eight million, eight hundred forty-two thousand, five hundred seven".