671845051 has 4 divisors (see below), whose sum is σ = 693517504. Its totient is φ = 650172600.

The previous prime is 671845037. The next prime is 671845063. The reversal of 671845051 is 150548176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 671845051 - 2¹⁹ = 671320763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671845051.

It is not an unprimeable number, because it can be changed into a prime (671845081) 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, 10836180 + ... + 10836241.

It is an arithmetic number, because the mean of its divisors is an integer number (173379376).

Almost surely, 2^671845051 is an apocalyptic number.

671845051 is a deficient number, since it is larger than the sum of its proper divisors (21672453).

671845051 is a wasteful number, since it uses less digits than its factorization.

671845051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21672452.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 671845051 is about 25919.9739776104. The cubic root of 671845051 is about 875.8365011646.

The spelling of 671845051 in words is "six hundred seventy-one million, eight hundred forty-five thousand, fifty-one".