671745051 has 12 divisors (see below), whose sum is σ = 983591128. Its totient is φ = 441694944.

The previous prime is 671745049. The next prime is 671745071. The reversal of 671745051 is 150547176.

It is not a de Polignac number, because 671745051 - 2¹ = 671745049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671744997 and 671745015.

It is not an unprimeable number, because it can be changed into a prime (671745071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 510565 + ... + 511878.

Almost surely, 2^671745051 is an apocalyptic number.

671745051 is a deficient number, since it is larger than the sum of its proper divisors (311846077).

671745051 is a wasteful number, since it uses less digits than its factorization.

671745051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022522 (or 1022519 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 671745051 is about 25918.0448915423. The cubic root of 671745051 is about 875.7930447179.

The spelling of 671745051 in words is "six hundred seventy-one million, seven hundred forty-five thousand, fifty-one".