630656678 has 16 divisors (see below), whose sum is σ = 980246880. Its totient is φ = 303944256.

The previous prime is 630656657. The next prime is 630656687. The reversal of 630656678 is 876656036.

It is a happy number.

630656678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×630656678³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26975 + ... + 44597.

It is an arithmetic number, because the mean of its divisors is an integer number (61265430).

Almost surely, 2^630656678 is an apocalyptic number.

630656678 is a deficient number, since it is larger than the sum of its proper divisors (349590202).

630656678 is a wasteful number, since it uses less digits than its factorization.

630656678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18271.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The square root of 630656678 is about 25112.8787278560. The cubic root of 630656678 is about 857.5596393112.

The spelling of 630656678 in words is "six hundred thirty million, six hundred fifty-six thousand, six hundred seventy-eight".