671612767 has 12 divisors (see below), whose sum is σ = 796007736. Its totient is φ = 564804240.

The previous prime is 671612749. The next prime is 671612783. The reversal of 671612767 is 767216176.

It is a de Polignac number, because none of the positive numbers 2^k-671612767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671612797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126709 + ... + 131902.

It is an arithmetic number, because the mean of its divisors is an integer number (66333978).

Almost surely, 2^671612767 is an apocalyptic number.

671612767 is a deficient number, since it is larger than the sum of its proper divisors (124394969).

671612767 is a wasteful number, since it uses less digits than its factorization.

671612767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258678 (or 258671 counting only the distinct ones).

The product of its digits is 148176, while the sum is 43.

The square root of 671612767 is about 25915.4927987102. The cubic root of 671612767 is about 875.7355521654.

The spelling of 671612767 in words is "six hundred seventy-one million, six hundred twelve thousand, seven hundred sixty-seven".