606557551 has 4 divisors (see below), whose sum is σ = 606966400. Its totient is φ = 606148704.

The previous prime is 606557543. The next prime is 606557561. The reversal of 606557551 is 155755606.

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

It is a cyclic number.

It is not a de Polignac number, because 606557551 - 2³ = 606557543 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 (606557521) 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, 202191 + ... + 205168.

It is an arithmetic number, because the mean of its divisors is an integer number (151741600).

Almost surely, 2^606557551 is an apocalyptic number.

606557551 is a deficient number, since it is larger than the sum of its proper divisors (408849).

606557551 is a wasteful number, since it uses less digits than its factorization.

606557551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408848.

The product of its (nonzero) digits is 157500, while the sum is 40.

The square root of 606557551 is about 24628.3891271841. The cubic root of 606557551 is about 846.4942346440.

The spelling of 606557551 in words is "six hundred six million, five hundred fifty-seven thousand, five hundred fifty-one".