698066689 has 4 divisors (see below), whose sum is σ = 698613760. Its totient is φ = 697519620.

The previous prime is 698066647. The next prime is 698066713. The reversal of 698066689 is 986660896.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 698066689 - 2⁷ = 698066561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698069689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271617 + ... + 274174.

It is an arithmetic number, because the mean of its divisors is an integer number (174653440).

Almost surely, 2^698066689 is an apocalyptic number.

It is an amenable number.

698066689 is a deficient number, since it is larger than the sum of its proper divisors (547071).

698066689 is a wasteful number, since it uses less digits than its factorization.

698066689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547070.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The square root of 698066689 is about 26420.9517050389. The cubic root of 698066689 is about 887.0858220562.

The spelling of 698066689 in words is "six hundred ninety-eight million, sixty-six thousand, six hundred eighty-nine".