6698551 has 2 divisors, whose sum is σ = 6698552. Its totient is φ = 6698550.

The previous prime is 6698533. The next prime is 6698557. The reversal of 6698551 is 1558966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6698551 - 2⁹ = 6698039 is a prime.

It is a super-3 number, since 3×6698551³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6698557) 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 as a sum of consecutive naturals, namely, 3349275 + 3349276.

It is an arithmetic number, because the mean of its divisors is an integer number (3349276).

Almost surely, 2^6698551 is an apocalyptic number.

6698551 is a deficient number, since it is larger than the sum of its proper divisors (1).

6698551 is an equidigital number, since it uses as much as digits as its factorization.

6698551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 40.

The square root of 6698551 is about 2588.1559072050. The cubic root of 6698551 is about 188.5067717737.

The spelling of 6698551 in words is "six million, six hundred ninety-eight thousand, five hundred fifty-one".