671675651 has 2 divisors, whose sum is σ = 671675652. Its totient is φ = 671675650.

The previous prime is 671675629. The next prime is 671675657. The reversal of 671675651 is 156576176.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671675651 is a prime.

It is a super-2 number, since 2×671675651² = 902296360292547602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (671675657) 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 as a sum of consecutive naturals, namely, 335837825 + 335837826.

It is an arithmetic number, because the mean of its divisors is an integer number (335837826).

Almost surely, 2^671675651 is an apocalyptic number.

671675651 is a deficient number, since it is larger than the sum of its proper divisors (1).

671675651 is an equidigital number, since it uses as much as digits as its factorization.

671675651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 44.

The square root of 671675651 is about 25916.7060214063. The cubic root of 671675651 is about 875.7628834087.

The spelling of 671675651 in words is "six hundred seventy-one million, six hundred seventy-five thousand, six hundred fifty-one".