671620075 has 48 divisors (see below), whose sum is σ = 1015966720. Its totient is φ = 430168320.

The previous prime is 671620073. The next prime is 671620091. The reversal of 671620075 is 570026176.

It is not a de Polignac number, because 671620075 - 2¹ = 671620073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671620075.

It is not an unprimeable number, because it can be changed into a prime (671620073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 241342 + ... + 244108.

Almost surely, 2^671620075 is an apocalyptic number.

671620075 is a deficient number, since it is larger than the sum of its proper divisors (344346645).

671620075 is a wasteful number, since it uses less digits than its factorization.

671620075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876 (or 2871 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 671620075 is about 25915.6337950666. The cubic root of 671620075 is about 875.7387285256.

The spelling of 671620075 in words is "six hundred seventy-one million, six hundred twenty thousand, seventy-five".