671558898 has 32 divisors (see below), whose sum is σ = 1360510272. Its totient is φ = 220968000.

The previous prime is 671558897. The next prime is 671558911. The reversal of 671558898 is 898855176.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (671558897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224553 + ... + 227523.

It is an arithmetic number, because the mean of its divisors is an integer number (42515946).

Almost surely, 2^671558898 is an apocalyptic number.

671558898 is an abundant number, since it is smaller than the sum of its proper divisors (688951374).

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

671558898 is a wasteful number, since it uses less digits than its factorization.

671558898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450.

The product of its digits is 4838400, while the sum is 57.

The square root of 671558898 is about 25914.4534574820. The cubic root of 671558898 is about 875.7121377506.

The spelling of 671558898 in words is "six hundred seventy-one million, five hundred fifty-eight thousand, eight hundred ninety-eight".