67697645 has 24 divisors (see below), whose sum is σ = 85533048. Its totient is φ = 51425280.

The previous prime is 67697639. The next prime is 67697653. The reversal of 67697645 is 54679676.

It can be written as a sum of positive squares in 4 ways, for example, as 3232804 + 64464841 = 1798^2 + 8029^2 .

It is not a de Polignac number, because 67697645 - 2²⁰ = 66649069 is a prime.

It is a super-3 number, since 3×67697645³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 67697593 and 67697602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 350669 + ... + 350861.

It is an arithmetic number, because the mean of its divisors is an integer number (3563877).

Almost surely, 2^67697645 is an apocalyptic number.

It is an amenable number.

67697645 is a deficient number, since it is larger than the sum of its proper divisors (17835403).

67697645 is a wasteful number, since it uses less digits than its factorization.

67697645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 302 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 50.

The square root of 67697645 is about 8227.8578621656. The cubic root of 67697645 is about 407.5596560384.

The spelling of 67697645 in words is "sixty-seven million, six hundred ninety-seven thousand, six hundred forty-five".