671684801 has 4 divisors (see below), whose sum is σ = 700888512. Its totient is φ = 642481092.

The previous prime is 671684771. The next prime is 671684857. The reversal of 671684801 is 108486176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 671684801 - 2⁶ = 671684737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671684701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14601821 + ... + 14601866.

It is an arithmetic number, because the mean of its divisors is an integer number (175222128).

Almost surely, 2^671684801 is an apocalyptic number.

It is an amenable number.

671684801 is a deficient number, since it is larger than the sum of its proper divisors (29203711).

671684801 is a wasteful number, since it uses less digits than its factorization.

671684801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29203710.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 671684801 is about 25916.8825478683. The cubic root of 671684801 is about 875.7668601267.

The spelling of 671684801 in words is "six hundred seventy-one million, six hundred eighty-four thousand, eight hundred one".