671408111 has 32 divisors (see below), whose sum is σ = 809740800. Its totient is φ = 549521280.

The previous prime is 671408107. The next prime is 671408117. The reversal of 671408111 is 111804176.

It is not a de Polignac number, because 671408111 - 2² = 671408107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671408117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 946625 + ... + 947333.

It is an arithmetic number, because the mean of its divisors is an integer number (25304400).

Almost surely, 2^671408111 is an apocalyptic number.

671408111 is a deficient number, since it is larger than the sum of its proper divisors (138332689).

671408111 is a wasteful number, since it uses less digits than its factorization.

671408111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 671408111 is about 25911.5439717513. The cubic root of 671408111 is about 875.6465908117.

The spelling of 671408111 in words is "six hundred seventy-one million, four hundred eight thousand, one hundred eleven".