671155506 has 96 divisors (see below), whose sum is σ = 1796895360. Its totient is φ = 176732928.

The previous prime is 671155423. The next prime is 671155517. The reversal of 671155506 is 605551176.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84790 + ... + 92366.

It is an arithmetic number, because the mean of its divisors is an integer number (18717660).

Almost surely, 2^671155506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671155506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (898447680).

671155506 is an abundant number, since it is smaller than the sum of its proper divisors (1125739854).

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

671155506 is a wasteful number, since it uses less digits than its factorization.

671155506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7648 (or 7645 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 671155506 is about 25906.6691413620. The cubic root of 671155506 is about 875.5367617081.

The spelling of 671155506 in words is "six hundred seventy-one million, one hundred fifty-five thousand, five hundred six".