671770620 has 144 divisors (see below), whose sum is σ = 2121799680. Its totient is φ = 171849600.

The previous prime is 671770607. The next prime is 671770633. The reversal of 671770620 is 26077176.

671770620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (671770607) and next prime (671770633).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 730521 + ... + 731439.

It is an arithmetic number, because the mean of its divisors is an integer number (14734720).

Almost surely, 2^671770620 is an apocalyptic number.

671770620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671770620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1060899840).

671770620 is an abundant number, since it is smaller than the sum of its proper divisors (1450029060).

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

671770620 is a wasteful number, since it uses less digits than its factorization.

671770620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 671770620 is about 25918.5381532215. The cubic root of 671770620 is about 875.8041565071.

The spelling of 671770620 in words is "six hundred seventy-one million, seven hundred seventy thousand, six hundred twenty".