670820571 has 12 divisors (see below), whose sum is σ = 974318800. Its totient is φ = 444741840.

The previous prime is 670820539. The next prime is 670820581. The reversal of 670820571 is 175028076.

670820571 is a `hidden beast` number, since 6 + 7 + 0 + 82 + 0 + 571 = 666.

It is not a de Polignac number, because 670820571 - 2⁵ = 670820539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670820531) 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, 204271 + ... + 207528.

Almost surely, 2^670820571 is an apocalyptic number.

670820571 is a deficient number, since it is larger than the sum of its proper divisors (303498229).

670820571 is a wasteful number, since it uses less digits than its factorization.

670820571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411986 (or 411983 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 670820571 is about 25900.2040725551. The cubic root of 670820571 is about 875.3910941754.

The spelling of 670820571 in words is "six hundred seventy million, eight hundred twenty thousand, five hundred seventy-one".