606716551021 has 24 divisors (see below), whose sum is σ = 707765132664. Its totient is φ = 518576486400.

The previous prime is 606716550983. The next prime is 606716551027. The reversal of 606716551021 is 120155617606.

It can be written as a sum of positive squares in 4 ways, for example, as 17314875396 + 589401675625 = 131586^2 + 767725^2 .

It is not a de Polignac number, because 606716551021 - 2⁹ = 606716550509 is a prime.

It is a super-2 number, since 2×606716551021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (606716551027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25479321 + ... + 25503121.

It is an arithmetic number, because the mean of its divisors is an integer number (29490213861).

Almost surely, 2^606716551021 is an apocalyptic number.

It is an amenable number.

606716551021 is a deficient number, since it is larger than the sum of its proper divisors (101048581643).

606716551021 is a wasteful number, since it uses less digits than its factorization.

606716551021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25261 (or 25254 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 606716551021 in words is "six hundred six billion, seven hundred sixteen million, five hundred fifty-one thousand, twenty-one".