681766875 has 90 divisors (see below), whose sum is σ = 1295482188. Its totient is φ = 358182000.

The previous prime is 681766843. The next prime is 681766951. The reversal of 681766875 is 578667186.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 681766875 - 2⁵ = 681766843 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 10175592 + ... + 10175658.

Almost surely, 2^681766875 is an apocalyptic number.

681766875 is a deficient number, since it is larger than the sum of its proper divisors (613715313).

681766875 is an frugal number, since it uses more digits than its factorization.

681766875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 75 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 681766875 is about 26110.6659241008. The cubic root of 681766875 is about 880.1269079197.

The spelling of 681766875 in words is "six hundred eighty-one million, seven hundred sixty-six thousand, eight hundred seventy-five".