671436477 has 6 divisors (see below), whose sum is σ = 969852702. Its totient is φ = 447624312.

The previous prime is 671436457. The next prime is 671436499. The reversal of 671436477 is 774634176.

It can be written as a sum of positive squares in only one way, i.e., 622702116 + 48734361 = 24954^2 + 6981^2 .

It is not a de Polignac number, because 671436477 - 2⁷ = 671436349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671436457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37302018 + ... + 37302035.

It is an arithmetic number, because the mean of its divisors is an integer number (161642117).

Almost surely, 2^671436477 is an apocalyptic number.

It is an amenable number.

671436477 is a deficient number, since it is larger than the sum of its proper divisors (298416225).

671436477 is a wasteful number, since it uses less digits than its factorization.

671436477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74604059 (or 74604056 counting only the distinct ones).

The product of its digits is 592704, while the sum is 45.

The square root of 671436477 is about 25912.0913281811. The cubic root of 671436477 is about 875.6589222293.

The spelling of 671436477 in words is "six hundred seventy-one million, four hundred thirty-six thousand, four hundred seventy-seven".