689302699661 has 4 divisors (see below), whose sum is σ = 713071758300. Its totient is φ = 665533641024.

The previous prime is 689302699651. The next prime is 689302699669. The reversal of 689302699661 is 166996203986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 257765382436 + 431537317225 = 507706^2 + 656915^2 .

It is a cyclic number.

It is not a de Polignac number, because 689302699661 - 2⁶ = 689302699597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689302699669) 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, 11884529276 + ... + 11884529333.

It is an arithmetic number, because the mean of its divisors is an integer number (178267939575).

Almost surely, 2^689302699661 is an apocalyptic number.

It is an amenable number.

689302699661 is a deficient number, since it is larger than the sum of its proper divisors (23769058639).

689302699661 is a wasteful number, since it uses less digits than its factorization.

689302699661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23769058638.

The product of its (nonzero) digits is 45349632, while the sum is 65.

The spelling of 689302699661 in words is "six hundred eighty-nine billion, three hundred two million, six hundred ninety-nine thousand, six hundred sixty-one".