678674642 has 16 divisors (see below), whose sum is σ = 1094394240. Its totient is φ = 314636688.

The previous prime is 678674621. The next prime is 678674707. The reversal of 678674642 is 246476876.

It is a super-3 number, since 3×678674642³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

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, 188213 + ... + 191784.

It is an arithmetic number, because the mean of its divisors is an integer number (68399640).

Almost surely, 2^678674642 is an apocalyptic number.

678674642 is a deficient number, since it is larger than the sum of its proper divisors (415719598).

678674642 is a wasteful number, since it uses less digits than its factorization.

678674642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380065.

The product of its digits is 2709504, while the sum is 50.

The square root of 678674642 is about 26051.3846465020. The cubic root of 678674642 is about 878.7942517410.

The spelling of 678674642 in words is "six hundred seventy-eight million, six hundred seventy-four thousand, six hundred forty-two".