606400033681 has 16 divisors (see below), whose sum is σ = 676689345360. Its totient is φ = 539552563200.

The previous prime is 606400033667. The next prime is 606400033727. The reversal of 606400033681 is 186330004606.

It can be written as a sum of positive squares in 8 ways, for example, as 11366758225 + 595033275456 = 106615^2 + 771384^2 .

It is a de Polignac number, because none of the positive numbers 2^k-606400033681 is a prime.

It is a super-2 number, since 2×606400033681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 606400033681.

It is not an unprimeable number, because it can be changed into a prime (606400033081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1111600 + ... + 1564753.

It is an arithmetic number, because the mean of its divisors is an integer number (42293084085).

Almost surely, 2^606400033681 is an apocalyptic number.

It is an amenable number.

606400033681 is a deficient number, since it is larger than the sum of its proper divisors (70289311679).

606400033681 is a wasteful number, since it uses less digits than its factorization.

606400033681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676996.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 606400033681 in words is "six hundred six billion, four hundred million, thirty-three thousand, six hundred eighty-one".