670685620 has 96 divisors (see below), whose sum is σ = 1623638016. Its totient is φ = 230428800.

The previous prime is 670685597. The next prime is 670685669. The reversal of 670685620 is 26586076.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 292117 + ... + 294403.

It is an arithmetic number, because the mean of its divisors is an integer number (16912896).

Almost surely, 2^670685620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670685620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (811819008).

670685620 is an abundant number, since it is smaller than the sum of its proper divisors (952952396).

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

670685620 is a wasteful number, since it uses less digits than its factorization.

670685620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381 (or 2379 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 670685620 is about 25897.5987303843. The cubic root of 670685620 is about 875.3323885486.

The spelling of 670685620 in words is "six hundred seventy million, six hundred eighty-five thousand, six hundred twenty".