671340660 has 48 divisors (see below), whose sum is σ = 1880879616. Its totient is φ = 178916992.

The previous prime is 671340653. The next prime is 671340667. The reversal of 671340660 is 66043176.

It is an interprime number because it is at equal distance from previous prime (671340653) and next prime (671340667).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671340667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188254 + ... + 191786.

It is an arithmetic number, because the mean of its divisors is an integer number (39184992).

Almost surely, 2^671340660 is an apocalyptic number.

671340660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

671340660 is an abundant number, since it is smaller than the sum of its proper divisors (1209538956).

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

671340660 is a wasteful number, since it uses less digits than its factorization.

671340660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6712 (or 6710 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 671340660 is about 25910.2423763268. The cubic root of 671340660 is about 875.6172667611.

The spelling of 671340660 in words is "six hundred seventy-one million, three hundred forty thousand, six hundred sixty".