671201667 has 16 divisors (see below), whose sum is σ = 1052866080. Its totient is φ = 421145856.

The previous prime is 671201659. The next prime is 671201683. The reversal of 671201667 is 766102176.

It is not a de Polignac number, because 671201667 - 2³ = 671201659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671201627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730698 + ... + 731615.

It is an arithmetic number, because the mean of its divisors is an integer number (65804130).

Almost surely, 2^671201667 is an apocalyptic number.

671201667 is a deficient number, since it is larger than the sum of its proper divisors (381664413).

671201667 is a wasteful number, since it uses less digits than its factorization.

671201667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462339 (or 1462333 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 671201667 is about 25907.5600356344. The cubic root of 671201667 is about 875.5568339197.

The spelling of 671201667 in words is "six hundred seventy-one million, two hundred one thousand, six hundred sixty-seven".