670461660 has 144 divisors (see below), whose sum is σ = 2260833120. Its totient is φ = 159444480.

The previous prime is 670461647. The next prime is 670461667. The reversal of 670461660 is 66164076.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670461667) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101746 + ... + 108134.

It is an arithmetic number, because the mean of its divisors is an integer number (15700230).

Almost surely, 2^670461660 is an apocalyptic number.

670461660 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 670461660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1130416560).

670461660 is an abundant number, since it is smaller than the sum of its proper divisors (1590371460).

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

670461660 is a wasteful number, since it uses less digits than its factorization.

670461660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6468 (or 6463 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 670461660 is about 25893.2744163422. The cubic root of 670461660 is about 875.2349453448.

The spelling of 670461660 in words is "six hundred seventy million, four hundred sixty-one thousand, six hundred sixty".