606918861 has 12 divisors (see below), whose sum is σ = 888670588. Its totient is φ = 399069504.

The previous prime is 606918839. The next prime is 606918877. The reversal of 606918861 is 168819606.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 357436836 + 249482025 = 18906^2 + 15795^2 .

It is not a de Polignac number, because 606918861 - 2¹⁴ = 606902477 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 (606918811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 461230 + ... + 462543.

Almost surely, 2^606918861 is an apocalyptic number.

It is an amenable number.

606918861 is a deficient number, since it is larger than the sum of its proper divisors (281751727).

606918861 is a wasteful number, since it uses less digits than its factorization.

606918861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923852 (or 923849 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 606918861 is about 24635.7232692690. The cubic root of 606918861 is about 846.6622792224.

The spelling of 606918861 in words is "six hundred six million, nine hundred eighteen thousand, eight hundred sixty-one".