671166771 has 16 divisors (see below), whose sum is σ = 1007735808. Its totient is φ = 393645600.

The previous prime is 671166751. The next prime is 671166779. The reversal of 671166771 is 177661176.

It is not a de Polignac number, because 671166771 - 2⁵ = 671166739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671166779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327016 + ... + 329061.

It is an arithmetic number, because the mean of its divisors is an integer number (62983488).

Almost surely, 2^671166771 is an apocalyptic number.

671166771 is a deficient number, since it is larger than the sum of its proper divisors (336569037).

671166771 is a wasteful number, since it uses less digits than its factorization.

671166771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656122.

The product of its digits is 74088, while the sum is 42.

The square root of 671166771 is about 25906.8865555087. The cubic root of 671166771 is about 875.5416601588.

The spelling of 671166771 in words is "six hundred seventy-one million, one hundred sixty-six thousand, seven hundred seventy-one".