670659678 has 48 divisors (see below), whose sum is σ = 1582504560. Its totient is φ = 204031872.

The previous prime is 670659659. The next prime is 670659679. The reversal of 670659678 is 876956076.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670659679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4725 + ... + 36927.

It is an arithmetic number, because the mean of its divisors is an integer number (32968845).

Almost surely, 2^670659678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670659678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (791252280).

670659678 is an abundant number, since it is smaller than the sum of its proper divisors (911844882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

670659678 is a wasteful number, since it uses less digits than its factorization.

670659678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32313 (or 32310 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The square root of 670659678 is about 25897.0978682940. The cubic root of 670659678 is about 875.3211025030.

The spelling of 670659678 in words is "six hundred seventy million, six hundred fifty-nine thousand, six hundred seventy-eight".