671685351 has 16 divisors (see below), whose sum is σ = 957475584. Its totient is φ = 417354624.

The previous prime is 671685349. The next prime is 671685379. The reversal of 671685351 is 153586176.

It is not a de Polignac number, because 671685351 - 2¹ = 671685349 is a prime.

It is a super-2 number, since 2×671685351² = 902322421495986402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671685851) 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 15 ways as a sum of consecutive naturals, for example, 58681 + ... + 69186.

It is an arithmetic number, because the mean of its divisors is an integer number (59842224).

Almost surely, 2^671685351 is an apocalyptic number.

671685351 is a deficient number, since it is larger than the sum of its proper divisors (285790233).

671685351 is a wasteful number, since it uses less digits than its factorization.

671685351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127990.

The product of its digits is 151200, while the sum is 42.

The square root of 671685351 is about 25916.8931587102. The cubic root of 671685351 is about 875.7670991633.

The spelling of 671685351 in words is "six hundred seventy-one million, six hundred eighty-five thousand, three hundred fifty-one".