606642691 has 4 divisors (see below), whose sum is σ = 606695400. Its totient is φ = 606589984.

The previous prime is 606642643. The next prime is 606642703. The reversal of 606642691 is 196246606.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 606642691 - 2⁷ = 606642563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (606640691) 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, 886 + ... + 34843.

It is an arithmetic number, because the mean of its divisors is an integer number (151673850).

Almost surely, 2^606642691 is an apocalyptic number.

606642691 is a deficient number, since it is larger than the sum of its proper divisors (52709).

606642691 is a wasteful number, since it uses less digits than its factorization.

606642691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52708.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 606642691 is about 24630.1175596058. The cubic root of 606642691 is about 846.5338391010.

The spelling of 606642691 in words is "six hundred six million, six hundred forty-two thousand, six hundred ninety-one".