671420574 has 72 divisors (see below), whose sum is σ = 1631703528. Its totient is φ = 197881920.

The previous prime is 671420543. The next prime is 671420597. The reversal of 671420574 is 475024176.

671420574 is a `hidden beast` number, since 67 + 1 + 4 + 20 + 574 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 269824 + ... + 272300.

It is an arithmetic number, because the mean of its divisors is an integer number (22662549).

Almost surely, 2^671420574 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671420574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (815851764).

671420574 is an abundant number, since it is smaller than the sum of its proper divisors (960282954).

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

671420574 is a wasteful number, since it uses less digits than its factorization.

671420574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570 (or 2530 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 671420574 is about 25911.7844619007. The cubic root of 671420574 is about 875.6520088357.

The spelling of 671420574 in words is "six hundred seventy-one million, four hundred twenty thousand, five hundred seventy-four".