671558899 has 8 divisors (see below), whose sum is σ = 764462592. Its totient is φ = 583964040.

The previous prime is 671558897. The next prime is 671558911. The reversal of 671558899 is 998855176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 671558899 - 2¹ = 671558897 is a prime.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1326939 + ... + 1327444.

It is an arithmetic number, because the mean of its divisors is an integer number (95557824).

Almost surely, 2^671558899 is an apocalyptic number.

671558899 is a deficient number, since it is larger than the sum of its proper divisors (92903693).

671558899 is a wasteful number, since it uses less digits than its factorization.

671558899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654417.

The product of its digits is 5443200, while the sum is 58.

The square root of 671558899 is about 25914.4534767762. The cubic root of 671558899 is about 875.7121381853.

The spelling of 671558899 in words is "six hundred seventy-one million, five hundred fifty-eight thousand, eight hundred ninety-nine".