671061612 has 96 divisors (see below), whose sum is σ = 1751016960. Its totient is φ = 198696960.

The previous prime is 671061607. The next prime is 671061613. The reversal of 671061612 is 216160176.

It is a self number, because there is not a number n which added to its sum of digits gives 671061612.

It is not an unprimeable number, because it can be changed into a prime (671061613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 475564 + ... + 476972.

It is an arithmetic number, because the mean of its divisors is an integer number (18239760).

Almost surely, 2^671061612 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 671061612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (875508480).

671061612 is an abundant number, since it is smaller than the sum of its proper divisors (1079955348).

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

671061612 is a wasteful number, since it uses less digits than its factorization.

671061612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543 (or 1541 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 671061612 is about 25904.8569191185. The cubic root of 671061612 is about 875.4959308913.

The spelling of 671061612 in words is "six hundred seventy-one million, sixty-one thousand, six hundred twelve".