671247660 has 96 divisors (see below), whose sum is σ = 1920752064. Its totient is φ = 175104000.

The previous prime is 671247653. The next prime is 671247671. The reversal of 671247660 is 66742176.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 881680 + ... + 882440.

It is an arithmetic number, because the mean of its divisors is an integer number (20007834).

Almost surely, 2^671247660 is an apocalyptic number.

671247660 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 671247660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (960376032).

671247660 is an abundant number, since it is smaller than the sum of its proper divisors (1249504404).

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

671247660 is a wasteful number, since it uses less digits than its factorization.

671247660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 671247660 is about 25908.4476570867. The cubic root of 671247660 is about 875.5768321645.

The spelling of 671247660 in words is "six hundred seventy-one million, two hundred forty-seven thousand, six hundred sixty".