671006551 has 2 divisors, whose sum is σ = 671006552. Its totient is φ = 671006550.

The previous prime is 671006537. The next prime is 671006573. The reversal of 671006551 is 155600176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671006551 - 2¹⁷ = 670875479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671006591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335503275 + 335503276.

It is an arithmetic number, because the mean of its divisors is an integer number (335503276).

Almost surely, 2^671006551 is an apocalyptic number.

671006551 is a deficient number, since it is larger than the sum of its proper divisors (1).

671006551 is an equidigital number, since it uses as much as digits as its factorization.

671006551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 671006551 is about 25903.7941429436. The cubic root of 671006551 is about 875.4719852510.

The spelling of 671006551 in words is "six hundred seventy-one million, six thousand, five hundred fifty-one".